Question

one application send me please .
subject. application regarding verifying that all the details are correct and choosing maths basic or standard and medium of social science.
maths =standard.
medium=English
and all details are correct.
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Answer 1

Answer:

Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. ... The wavelength decreases as the light enters the medium and the light wave changes direction.!!