Question

4. A ray of light falls on the surface of a spherical glass paper weight making an angle ? with the normal and is refracted in the medium at an angle ? . The angle of deviation of the emergent ray from the direction of the incident ray is: and ph of e can (a) (?-?) (c) (a28) 5.A ray of light passes from vacuum into a medium of refractive index ?, the angle of incidence is found to be twice the angle of refraction. Then the angle of incidence is: (a) cos 1() (c) 2sin-() (b) 2(?-?) (b) 2cos () (d) 2sin ( 1) 6.Wh into water (n 1.333), (a) the wavelength increases and the frequency is unchanged. (b) the wavelength decreases and the frequency is unchanged. (c) the wavelength is unchanged and the frequency increases. (d) the wavelength is unchanged and the frequency decreases. both the wavelength and the frequency change. 7.Light passes from vacuum (index of refraction n - 1) into water (n hen light passes from vacuum (index of refraction n es the elocity Sin ic 1.333). If the incident angle is in the range (a) the refracted angle is greater than the incident angle. n water (b) the refracted angle is equal to the incident angle face AB (c) the refracted angle is less than the incident angle.