Refraction of lights differs from reflection in that, in refraction i. at least two media are involved ii. there is a change in the direction of the ray iii. the speed of the ray changes. Which of the statements above is/are correct?
At least two media are involved: True for refraction.
There is a change in the direction of the ray: True for both refraction and reflection.
The speed of the ray changes: True only for refraction.
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