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प्रश्न
Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?
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उत्तर
The speed of light in glass is not independent of the colour of light.
The refractive index of a violet component of white light is greater than the refractive index of a red component. Hence, the speed of violet light is less than the speed of red light in glass. Hence, violet light travels slower than red light in a glass prism.
संबंधित प्रश्न
Explain how Corpuscular theory predicts the speed of light in a medium, say, water, to be greater than the speed of light in vacuum. Is the prediction confirmed by experimental determination of the speed of light in water? If not, which alternative picture of light is consistent with the experiment?
A plane wavefront propagating in a medium of refractive index 'μ1' is incident on a plane surface making the angle of incidence 'i' as shown in the figure. It enters into a medium of refractive index 'μ2' (μ2 > μ1). Use Huygens' construction of secondary wavelets to trace the propagation of the refracted wavefront. Hence verify Snell's law of refraction.
The wavefronts of a light wave travelling in vacuum are given by x + y + z = c. The angle made by the direction of propagation of light with the X-axis is _________ .
The wavefronts of light coming from a distant source of unknown shape are nearly _________ .
Light waves travel from optically rarer medium to optically denser medium. Its velocity decreases bec;ause of change in ______.
A light ray in a medium (RI = 5/3) enters another medium at an angle of 30°. The angle in the other medium is sin-1 (5/6). The incident angle must be increased such that the ray is completely reflected at minimum degrees is ______.
Using Huygens’s construction of secondary wavelets draw a diagram showing the passage of a plane wavefront from a denser to a rarer medium. Using it verifies Snell’s law.
Which principle can be used to derive the laws of refraction?
In the refraction construction, which medium is assumed to be denser?
What does \[\frac{\sin i}{\sin r}\] equal in terms of the speeds in the two media?
Which equation is Snell's law of refraction for media 1 and 2?
Which expression gives the wavelength of light in medium 1?
Which expression gives the wavelength of light in medium 2?
What happens to the wavelength of light when it goes from a rarer to a denser medium?
How does the speed of light in a denser medium compare with its speed in a rarer medium?
Which picture of light was needed to address why its speed differs between media?
