a,So sánh điểm giống nhau và khác nhau giữa hiện tượng khúc xạ và hiện tượng phản xạ ánh sáng b, quan sát chiếc đũa trong 1 cái bình đựng nước ta thấy chiếc đũa như bị gãy khúc tại điểm giao của nó với mặt nước hãy giải thích hiênn tượng này

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Đáp án:

a)+ Giống nhau: Cả hai hiện tượng tia sáng đều bị gãy khúc

+ Khác nhau:

- Hiện tượng phản xạ ánh sáng

+

- Tia tới gặp mắt phân cách giữa hai môi trường trong suốt bị hắt trở lại môi trường trong suôt cũ

- Góc phản xạ bằng góc tới

Hiện ượng khúc xạ ánh sáng

_

 - Tia tới gặp mặt phân cách giữa hai môi trường trong suốt bị gãy khúc tại mặt phân cách và tiếp tục đi vào môi trường trong suốt thứ hai

- Góc khúc xạ không bằng góc tới

b)

Ta thấy như vậy là do hiện tượng khúc xạ ánh sáng

(Ta nhìn thấy vật khi có ánh sáng truyền từ vật vào mắt ta)Bởi hiện tượng khúc xạ

ánh sáng mà tia sáng từ đầu dưới nước của đũa trên đường truyền từ vật vào mắt ta đã bị gãy khúc tại mặt phân cách giữa hai môi trường nên ta thấy đũa dường như bị gãy khúc tại điểm chiếc đũa giao với mặt nước



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