pt A light ray is incident at a right angle on one of the surfaces of a glass pr
ID: 1404054 • Letter: P
Question
pt A light ray is incident at a right angle on one of the surfaces of a glass prism as shown in the figure. The top angle of the prism is a 27 The index of refraction of the glass is n 1.45. At what angle will the light ray exit the other surface of the prism? (in deg 33, AO 4.12 x 10 BO 4.82 x 10 CO 5.64 x 10 DO 6.59 x 10' EO 7.71 x 10 FO 9.03 x 10 GO 1.06 x 10 HO 1.24 x 10 pt A thin layer of oil of refractive index 1.23 is spread on the surface of water (n 1.33). If the thickness of the oil is 245 nm, then what is the wavelength of light in air that will be predominantly reflected from the top surface of the oil? (in nm) 34, AO 1.58 x 10 BO 1.97 x 10 CO 2.47 x 10 DO 3.09 x 10 EO 3.86 x 10 FO 4.82 x 10 GO 6.03 x 10 HO 7.53 x 10Explanation / Answer
n1sini = n2sntheta
n1 = 1.45
n2 = 1
sini = 27 degree
theta = sin^-1(1.45*sin27/1)
theta = 4.12x10^1 deg (A option)
Qns2 )
2t = m*lambda/n
t = 245 nm
n = 1.23
m =1
lambda =2t*n
lambda = 6.03 x 10^2 nm (G option)
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