Optics Question 730

Question: A beam of monochromatic blue light of wavelength 4200AA in air travels in water ( μ=4/3 ). Its wavelength in water will be

[MNR 1991; UPSEAT 2000]

Options:

A) 2800AA

B) 5600AA

C) 3150AA

D) 4000AA

Show Answer

Answer:

Correct Answer: C

Solution:

μ1λ

Therefore 14/3=x4200x=3150 AA



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