Ray Optics and Optical Instruments - Result Question 25
25. 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 $(c=3 \times 10^{8} ms^{-1}.$ )
(a) $3640 \AA$
(b) $5460 \AA$
(c) $4861 \AA$
(d) none of the above
[1991]
Topic 3: Refraction at Curved Surface, Lenses & Power of Lens
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Answer:
Correct Answer: 25. (a)
Solution:
- (a) $\lambda_g=\frac{\lambda_a}{\mu}=\frac{5460}{1.5}=3640 \AA$
