Ray Optics — Physics

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Question 1
EasyJEE

The refractive index of amediuma medium is:

A. c/vc/v
B. v/cv/c
C. c×v
D. c/v2c/v^{2}
Question 2
EasyJEE

A concave lens always forms:

A. Virtual, erect, diminished
B. Real, inverted, magnified
C. Virtual, erect, magnified
D. Real, inverted, diminished
Question 3
MediumJEE

The lens maker formula is:

A. 1/f=(μ−1)(1/R1−1/R2)1/f = (μ-1)(1/R1 - 1/R2)
B. 1/f=(μ−1)(1/R1+1/R2)1/f = (μ-1)(1/R1 + 1/R2)
C. 1/f=(μ+1)(1/R1−1/R2)1/f = (μ+1)(1/R1 - 1/R2)
D. 1/f=(μ−1)(R1−R2)1/f = (μ-1)(R1 - R2)

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