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Earn 100
A ray of light travelling inside a rectangular glass block of refractive index is incident on the glass-air surface at an angle of incidence of . The refractive index of air is . Under these conditions the ray will
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Important Questions on Ray Optics
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When a ray of light enters a glass slab from air
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A convex lens is in contact with concave lens. The magnitude of the ratio of their powers is . Their equivalent focal length is . What are their individual focal lengths (in )?
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A convex lens of glass has a focal length of when placed in air. What is the focal length of lens when it is immersed in water
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A lens is formed by pressing mutually plane surfaces of two similar plano-convex lenses of focal length . For forming an image of same size, real and inverted one, the object is to be kept for the lens at distance equal to
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Two lenses of power and are placed in contact. The combined focal length of the combination will be
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A double convex thin lens made of glass (refractive index ) has both radii of curvatures of magnitude . Incident light rays parallel to the axis of the lens, will converge at a distance such that
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A combination of two thin convex lenses of focal length and will have minimum spherical and chromatic aberrations if the distance between them is
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Spherical aberration in a lens:
