II. BÀI TẬP VẬN DỤNG
Câu 1: Trên hình vẽ một tia sáng SI chiếu lên một gương phẳng. góc tạo bới tia SI với mặt gương phẳng bằng 300
a. Hãy vẽ tiếp tia phản xạ
b. Tính góc phản xạ
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
Câu 2: Chiếu một tia sáng SI lên một gương phẳng
a. Vẽ tia phản xạ
b. Vẽ một vị trí đặt gương để thu được tia phản xạ theo phương nằm ngang từ trái sang phải.
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
Câu 3: Cho 3 chùm tia hội tụ, phân kì, song song lần lượt được chiếu vào gương phẳng (M). Vẽ hình mỗi trường hợp. Dựa vào hình vẽ này, ta có thể rút ra những kết luận gì?
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
Câu 4: Một gương phẳng đặt trên mặt bàn nằm ngang, gần một bức tường thẳng đứng. Dùng đèn pin chiếu một tia sáng lên gương sao cho tia phản xạ gặp bức tường. Hãy vẽ hai tia tới cho hai tia phản xạ gặp bức tường ở cùng một điểm M.
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
Câu 5: Cho gương phẳng (M), tia sáng tới SI đến gương với góc i = 500.
a. Tính góc hợp bởi tia phản xạ và gương phẳng (M)
b. Nếu góc tới i = 00, góc phản xạ là bao nhiêu? Từ đó rút ra kết luận gì?
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
Câu 6: Cho các hình a, b, c, d hãy:
1. Vẽ các tia phản xạ (hoặc tia tới)
2. Xác định độ lớn của góc tới i (hoặc góc phản xạ i’)
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
Câu 7: Cho các hình vẽ sau, biết I là điểm tới, SI là tia sáng truyền tới gương phẳng, IR là tia phản xạ trên gương. Hãy:
1. Vẽ pháp tuyến với gương tại điểm tới
2. Xác định vị trí của gương
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................