Ray Optics And Optical Instruments — Physics

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Question 1
EasyJEE

The speed of lightinamediumofrefractiveindexnlight in a medium of refractive index n is:

A. c/nc/n
B. c×n
C. n/cn/c
D. c/n2c/n²
Question 2
EasyJEE

The angle of incidence at which the angle of refraction is 90° is called:

A. Critical angle
B. Angle of deviation
C. Brewster angle
D. Angle of reflection
Question 3
MediumJEE

The lens formula is:

A. 1/f=1/v−1/u1/f = 1/v - 1/u
B. 1/f=1/v+1/u1/f = 1/v + 1/u
C. 1/f=v−u1/f = v - u
D. 1/f=u−v1/f = u - v

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