The extent of the change in the direction that takes place when a light ray travels from one medium to another is given by……………….. 

Correct Answer - Critical angle

Correct Answer - अयूब ने ज्यादा दूरी तय की। यह दूरी 0.9 km या 900 m ज्यादा थी।

Correct option is  B) Refraction

A) x and y are true

B) Refractive index

B) relative refractive index

C) denser to rarer medium

C) critical angle

(D) Light must travel from the medium of refractive index µ2 to µ1.

D) The disturbance travels