The extent of the change in direction that takes place when a light ray propagates through one medium to another medium is called …………….. 

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) relative refractive index

B) refractive index of 2nd medium with respect to 1st medium 

Correct option is  A) towards

C) refractive index

C) denser to rarer medium

Correct option is  A) 2 times