Question

The maximum angle, at which we are able to see the whole object is called

1) Angle of refraction

2) Angle of vision

3) Incident angle

4) Both 2 & 3​

Answer 1

Answer:

angle of vision

Explanation:

hope it helps

Answer 2

Answer:angle of refraction

Explanation:Refraction is also another phenomenon verifying the straight line motion of light   Refraction is the abrupt bending of light upon entering a new transparent medium.  In this connection, the index of refraction will be defined.  Light travels at different speeds in different media.  For example the speed of light in glass is 200,000,000 m/s.  Light speed in water is 225,000,000 m/s and in vacuum, 300,000,000 m/s.