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Physics-

General

Easy

Question

A light ray I is incident on a plane mirror M. The mirror is rotated in the direction as shown in the figure by an arrow at frequency $9 divided by pi$ rps. The light reflected by the mirror is received on the wall W at a distance 10 m from the axis of rotation. When the angle of incidence becomes $37 to the power of ring operator end exponent$ the speed of the spot (a point) on the wall is

10 m/s
1000 m/s
500 m/s
None of these

The correct answer is: 1000 m/s

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Two plane mirrors of length L are separated by distance L and a man $M subscript 2 end subscript$ is standing at distance L from the connecting line of mirrors as shown in figure. A man $M subscript 1 end subscript$ is walking in a straight line at distance 2 L parallel to mirrors at speed u, then man $M subscript 2 end subscript$ at O will be able to see image of $M subscript 1 end subscript$ for time:

Two plane mirrors of length L are separated by distance L and a man $M subscript 2 end subscript$ is standing at distance L from the connecting line of mirrors as shown in figure. A man $M subscript 1 end subscript$ is walking in a straight line at distance 2 L parallel to mirrors at speed u, then man $M subscript 2 end subscript$ at O will be able to see image of $M subscript 1 end subscript$ for time:

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A ray of light strikes a plane mirror at an angle of incidence $45 to the power of ring operator end exponent$ as shown in the figure. After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is $4 to the power of ring operator end exponent$ . The angle through which the mirror should be rotated if the total deviation of the ray is to be $90 to the power of ring operator end exponent$ is :

A ray of light strikes a plane mirror at an angle of incidence $45 to the power of ring operator end exponent$ as shown in the figure. After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is $4 to the power of ring operator end exponent$ . The angle through which the mirror should be rotated if the total deviation of the ray is to be $90 to the power of ring operator end exponent$ is :

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In the figure given below, there are two convex lens $L subscript 1 end subscript$ and $L subscript 2 end subscript$ having focal length of $f subscript 1 end subscript$ and $f subscript 2 end subscript$ respectively. The distance between $L subscript 1 end subscript$ and $L subscript 2 end subscript$ will be

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A thin symmetrical double convex lens of power P is cut into three parts, as shown in the figure. Power of A is:

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A beam of diameter ‘ d ‘ is incident on a glass hemisphere as shown in the figure. If the radius of curvature of the hemisphere is very large in comparison to d, then the diameter of the beam at the base of the hemisphere will be:

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The image for the converging beam after refraction through the curved surface (in the given figure) is formed at:

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A beam of light is converging towards a point. A plane parallel plate of glass of thickness t, refractive index m is introduced in the path of the beam as shown in the figure. The convergent point is shifted by (assume near normal incidence):

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AZ ray of light travelling in air is incident at grazing incidence on a slab with variable refractive index $n open parentheses y close parentheses equals open square brackets k y to the power of fraction numerator fraction numerator 1 over denominator 2 end fraction over denominator plus end fraction 1 end exponent 1 close square brackets to the power of fraction numerator 1 over denominator 2 end fraction end exponent$ where $k equals 1 m to the power of negative 3 divided by 2 end exponent$ and follows path as shown in the figure. What is the total deviation produced by slab when the ray comes out

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