Questions in Ray Optics and Optical Instruments

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	In the adjoining diagram, a wavefront AB, moving in air is incident on a plane glass surface XY. Its position CD after refraction through a glass slab is shown also along with the normals drawn at A and D. The refractive index of glass with respect to air ($\mu =1$) will be equal to
	When light enters from air to water, then its
	On a glass plate a light wave is incident at an angle of 60°. If the reflected and the refracted waves are mutually perpendicular, the refractive index of material is
	Refractive index of glass is $\frac{3}{2}$ and refractive index of water is $\frac{4}{3}$. If the speed of light in glass is $2.00\times {{10}^{8}}$ m/s, the speed in water will be
	Monochromatic light of frequency $5\times {{10}^{14}}$Hz travelling in vacuum enters a medium of refractive index 1.5. Its wavelength in the medium is
	Light of wavelength is 7200 Å in air. It has a wavelength in glass ($\mu =1.5$) equal to
	Which of the following is not a correct statement
	Which of the following is a correct relation
	The time taken by sunlight to cross a 5 mm thick glass plate $(\mu =3/2$) is
	The distance travelled by light in glass (refractive index =1.5) in a nanosecond will be