A rays of light is incident on a thick slab of glass of thickness t as shown in figure. The emergent ray is parallel to the incident ray but displaced sideways by a distance d. If the angles are small then d is A. `t(1+(i)/(r))`B. `rt(1-(i)/(r))`C. `it(1-(r)/(i))`D. `t(1+(r)/(i))`

A rays of light is incident on a thick slab of glass of thickness t as

1.	A rays of light is incident on a thick slab of glass of thickness t as shown in figure. The emergent ray is parallel to the incident ray but displaced sideways by a distance d. If the angles are small then d is A. `t(1+(i)/(r))`B. `rt(1-(i)/(r))`C. `it(1-(r)/(i))`D. `t(1+(r)/(i))`
Answer» Correct Answer - C Lateral shift, ` d = (t)/(cosr) sin (i-r)` For small angles `sin(i-r) ~~ i - r`, `cosr~~1` `d = t(i-r), d =` it `[1- (r)/(i)]`

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A rays of light is incident on a thick slab of glass of thickness t as shown in figure. The emergent ray is parallel to the incident ray but displaced sideways by a distance d. If the angles are small then d is A. `t(1+(i)/(r))`B. `rt(1-(i)/(r))`C. `it(1-(r)/(i))`D. `t(1+(r)/(i))`

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