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प्रश्न
The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0 × 108 m s−1)
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उत्तर
Refractive index of glass, μ = 1.5
Speed of light, c = 3 × 108 m/s
Speed of light in glass is given by the relation,
v = `c/μ`
= `(3 xx 10^8)/1.5`
= 2 × 108 m/s
Hence, the speed of light in glass is 2 × 108 m/s.
संबंधित प्रश्न
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(i) Nature of the source
(ii) Direction of propagation
(iii) Motion of the source and/or observer
(iv) Wavelength
(v) Intensity of the wave
On which of these factors, if any, does the speed of light in vacuum?
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What is the direction of the refracted ray relative to the refracted wavefront?
What does \[\frac{\sin i}{\sin r}\] equal in terms of the speeds in the two media?
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Which expression gives the wavelength of light in medium 1?
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What happens to the wavelength of light when it goes from a rarer to a denser medium?
What could the ray picture of light explain while remaining silent on why light's speed differs between media?
How does the wave picture's conclusion about the speed of light in a denser medium compare with that deduced from the particle picture?
