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प्रश्न
When a light wave travels from air to glass ______.
विकल्प
its wavelength decreases
its wavelength increases
there is no change in wavelength
its frequency decreases
MCQ
रिक्त स्थान भरें
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उत्तर
When a light wave travels from air to glass its wavelength decreases.
Explanation:
When light travels from air (rarer medium) to glass (denser medium), its speed decreases, so according to the relation (v = f λ) (speed = frequency × wavelength) and the fact that frequency remains constant, the wavelength must decrease in glass. Hence, the light wave’s wavelength decreases when passing from air to glass.
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