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Let us list some of the factors which co...

Let us list some of the factors which could possibly influence the speed of wave propagation : (i) Nature of source (ii) direction of propagation (iii) motion of source and//or observer (iv) wave length (v) intensity of the wave.
On which of these factors, if any does (a) the speed of light in vaccum (b) speed of light in a medium (say glass or water) depend ?

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(a) Thespeed of light in a vacuum `i.e.,3xx10^(8) m//s` (approximately) is a universal constant.It is not affected by the motion of the source, the observer, or both. Hence, the given factor does not affect the speed of light in a vacuum.
(b) Out of the listed factors, the speed of light in a medium depends on the wavelength of light in that medium.
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A: The speed of light in vaccum doesn't depend on nature of the source, direction of propagation nature of the source, direction of propagation, motion of the source , or observer wavelength and intensity of the wave. R: The speed of light in vaccum is a universal constant independent of all the factors listed and anything else.

Does the speed of light in vaccume depend upon relative motion between source and observer ?

A beam of light propagating in medium A with index of refraction n(A) passes across an interface into medium B with index of refraction n(B) . If v(A) and v(B) are the speeds of light in A and B respectively. Then which of the following is true?

A: The speed of light, sound waves, water waves in a medium is independent of the nature of the source of intensity (so long it is low). R: Speed of the waves in a medium depends on wavelength.

(i) Find the speed of light of wavelength lambda =780 nm (in air) in a medium of of refractive index µ=1.55. (ii) What is the wave length of this light in the given medium?

Huygen was the figure scientist who proposed the idea of wave theory of light he said that the light propagates in form of wavelengths. A wavefront is a imaginary surface of every point of which waves are in the same. phase. For example the wavefront for a point source of light is collection of concentric spheres which have centre at the origin w_(1) is a wavefront w_(2) is another wavefront. The radius of the wavefront at time 't' is 'ct' in thic case where 'c' is the speed of light the direction of propagation of light is perpendicular to the surface of the wavelength. the wavefronts are plane wavefronts in case of a parallel beam of light. Huygen also said that every point of the wavefront acts as the source of secondary wavelets. The tangent drawn to all secondary wavelets at a time is the new wavefront at that time. The wavelets are to be considered only in the forward direction (i.e., the direction of propagation of light) and not in the reverse direction if a wavefront w_(1) and draw spheres of radius 'cDeltat' they are called secondary wavelets. Draw a surface w_(2) which is tangential to all these secondary wavelets w_(2) is the wavefront at time t+Deltat Huygen proved the laws of reflection and laws of refraction using concept of wavefront. Q. A point source of light is placed at origin, in air. the equation of wavefront of the wave at time t, emitted by source at t=0 is (take refractive index of air as 1)

A beam of light propagating in medium A with index of refraction n ( A ) passes across an interface into medium B with index of refraction n ( B ). The angle of incidence is greater than the angle of refraction, v ( A ) and v ( B ) denotes the speed of light in A and B . Then which of the following is true

Huygen was the figure scientist who proposed the idea of wave theory of light he said that the light propagates in form of wavelengths. A wavefront is a imaginary surface of every point of which waves are in the same. phase. For example the wavefront for a point source of light is collection of concentric spheres which have centre at the origin w_(1) is a wavefront w_(2) is another wavefront. The radius of the wavefront at time 't' is 'ct' in thic case where 'c' is the speed of light the direction of propagation of light is perpendicular to the surface of the wavelength. the wavefronts are plane wavefronts in case of a parallel beam of light. Huygen also said that every point of the wavefront acts as the source of secondary wavelets. The tangent drawn to all secondary wavelets at a time is the new wavefront at that time. The wavelets are to be considered only in the forward direction (i.e., the direction of propagation of light) and not in the reverse direction if a wavefront w_(1) and draw spheres of radius 'cDeltat' they are called secondary wavelets. Draw a surface w_(2) which is tangential to all these secondary wavelets w_(2) is the wavefront at time t+Deltat Huygen proved the laws of reflection and laws of refraction using concept of wavefront. Q. Spherical wavefronts shown in figure, strike a plane mirror. reflected wavefront will be as shown in

NCERT-WAVE OPTICS -Exercise
  1. What is the shape of the wavefront in each of the following cases ? ...

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  2. (a) The refractive index of glass is 1.5. What is the speed of light i...

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  3. In a Young's double-slit experiment , the slits are separated by 0.28 ...

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  4. In Young's double slit experiment using monochromatic light of wavelen...

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  5. A beam of light consisting of two wavelengths 650 nm and 520 nm, is us...

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  6. In a double slit experiment the angular width of a fringe is found to ...

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  7. What is Brewster angle for air to glass transtion ? (mu of glass is 1....

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  8. Light of wavelength 5000Å falls on a plane reflecting surface. What ar...

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  9. Estimate the distance for which ray optics is good approximation for a...

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  10. The 6563 Å H(2) line emitted by hydrogen in a star is found to be red ...

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  11. Explain how Corpuscular theory predicts the speed of light in a medium...

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  12. You have learnt in the text how Huygens’ principle leads to the laws o...

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  13. Let us list some of the factors which could possibly influence the spe...

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  14. For sound waves, the Doppler's formula for frequency shift differs sli...

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  15. In double slit experiment using light of wavelength 600 nm, the angula...

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  16. Answer the following questions (a) In a single slit diffraction expe...

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  17. Two towers on the top of two hills are 40 km apart. The line joining ...

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  18. A parallel beam of light of wavelength 500 nm falls on a narrow slit ...

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  19. Answer the following questions : (a) When a low flying aircraft pass...

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  20. In deriving the single slit diffraction pattern, it was stated that th...

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