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α is a solution of the equation where n 2, . Then the probability that lies on the real axis is
The correct answer is:
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The slab of a material of refractive index 2 shown in figure has curved surface APB of radius of curvature 10 cm and a plane surface CD. On the left of APB is air and on the right of CD is water with refractive indices as given in figure. An object O is placed at a distance of 15 cm from pole P as shown. The distance of the final image of O from P, as viewed from the left is
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.A rod of glass ( = 1.5) and of square cross section is bent into the shape shown in the figure. A parallel beam of light falls on the plane flat surface A as shown in the figure. If d is the width of a side and R is the radius of circular arc then for what maximum value of light entering the glass slab through surface A emerges from the glass through B
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In steel the young's modulus and the strain at the breaking point are and 0.15 respectively the stress at the breaking point for steel is therefore
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=
=
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