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प्रश्न
When light travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a reduction in the energy carried by the wave?
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उत्तर
The energy of the wave depends only on its frequency. Since the frequency does not change as the wave travels from one medium to another, therefore, the energy of the wave remains same and does not decrease.
संबंधित प्रश्न
Two monochromatic rays of light are incident normally on the face AB of an isosceles right-angled prism ABC. The refractive indices of the glass prism for the two rays '1' and '2' are respectively 1.3 and 1.5. Trace the path of these rays after entering the prism.
Two monochromatic rays of light are incident normally on the face AB of an isosceles right-angled prism ABC. The refractive indices of the glass prism for the two rays '1' and '2' are respectively 1.35 and 1.45. Trace the path of these rays after entering the prism.
What kind of fringes do you expect to observe if white light is used instead of monochromatic light?
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Monochromatic light of wavelength 650 nm falls normally on a slit of width 1 : 3 × 10-4 cm and the resulting Fraunhofer diffraction is obtained on a screen. Find the angular width of the central maxima.
(a) Can the interference pattern be produced by two independent monochromatic sources of light? Explain.
(b) The intensity at the central maximum (O) in Young's double-slit experimental set-up shown in the figure is IO. If the distance OP equals one-third of the fringe width of the pattern, show that the intensity at point P, would `"I"_°/4`
(c) In Young's double-slit experiment, the slits are separated by 0⋅5 mm and the screen is placed 1⋅0 m away from the slit. It is found that the 5th bright fringe is at a distance of 4⋅13 mm from the 2nd dark fringe. Find the wavelength of light used.
For constructive interference to take place between two monochromatic light waves of wavelength λ, the path difference should be ______.
Monochromatic light of wavelength 600 nm is incident from the air on a water surface. The refractive index of water is 1.33. Find the
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- frequency and
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