Ray Optics And Optical Instruments Ques 22

22. Green light of wavelength $5460$ $ \AA$ is incident on an air-glass interface. If the refractive index of glass is $1.5$ , the wavelength of light in glass would be $(c=3 \times 10^{8}$ $ ms^{-1}.$ )

[1991]

(a) $3640 $ $\AA$

(b) $5460 $ $\AA$

(c) $4861 $ $\AA$

(d) none of the above

Show Answer

Answer:

Correct Answer: 22.(a)

Solution:

  1. (a) $\lambda_g=\frac{\lambda_a}{\mu}=\frac{5460}{1.5}=3640$ $ \AA$
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