Ray Optics and Optical Instruments — Physics STD 12 Science — Question
Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments1 Mark
Question
When monochromatic light travels from one medium to another its wavelength changes but frequency remains the same, Explain.
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Answer
Atoms (of the second medium) oscillate with the same (incident light) frequency and in turn, emit light of the same frequency.Alternate Answer
Frequency of light may be viewed as a property of the source and not of the medium.Alternate Answer
From Huygen's principle, we find that $\frac{\text{v}_{1}}{\lambda_{1}} = \frac{\text{v}_{2}}{\lambda_{2}} = \text{n}$ Hence frequency remains the same.
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