A beam of light of wavelength 720 nm in air enters water (refractive index = 4 3 ). Its…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
A beam of light of wavelength 720 nm in air enters water (refractive index \(=\frac{4}{3}\) ). Its wavelength in water will be:
- 540 nm
- 480 nm
- 420 nm
- 720 nm
Answer
(A) 540 nm
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