WBJEE · Physics · Ray Optics
A beam of monochromatic blue light of wavelength \(4200 Å\) in air travels in water of refractive index \(4 / 3\). Its wavelength in water will be:
- A \(4200 Å\)
- B \(5800 Å\)
- C \(4150 Å\)
- D \(3150 Å\)
Answer & Solution
Correct Answer
(D) \(3150 Å\)
Step-by-step Solution
Detailed explanation
In water \(\lambda=\frac{4200}{\frac{4}{3}}=3150 Å\)
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