WAEC - Physics (2014 - No. 26)
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?
i only
i ad ii only
ii and iii only
i and iii only
Објашњење
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.