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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 26 - Geometrical Optics > A plastic hemisphere has a radius of curvature of 8cm and an index of refraction of 1.6 . On the axis halfway between the plane surface and the spherical one (4cm from each ) is a small object O. The distance between the two images when viewed along the axis from the two sides of the hemisphere is approximately .

A plastic hemisphere has a radius of curvature of 8cm and an index of refraction of 1.6 . On the axis halfway between the plane surface and the spherical one (4cm from each ) is a small object O. The distance between the two images when viewed along the axis from the two sides of the hemisphere is approximately .

A beam of light propagates through a medium 1 and falls onto another medium 2 at an angle α 1 as shown in Fig. After that it propagates in medium 2 at an angle α2 as shown. The light's wavelength in medium 1 is λ1. What is the wavelength of light in medium 2?