The deflection of light in a gravitational field was predicted first by
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Solution
Newton first predicted deflection of light by gravitational field.
A nicol prism is based on the action of
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Solution
When a ray of light enters nicol prism, it splits into two plane polarised light in mutually perpendicular direction. One of this light undergoes total reflection and absorption where as other comes out as a plane polarised light.
When a compact disc is illuminated by small source of white light, coloured bands are observed. This is due to
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Solution
The line rulings, each of 0.5 mm width,on a compact disc function as a diffraction grating. When a small source of light illuminates a disc, diffracted light forms coloured ‘lanes’ that are the composite of the diffraction patterns from the ruling.
Huygen’s concept of wavelets is useful in
Polarisation of light establishes
DIRECTION: Each question contains STATEMENT-1 and STATEMENT-2. Choose the correct answer(ONLY ONE option is correct ) from the following-
Statement 1: In YDSE number of bright fringe or dark fringe can not be unlimited
Statement 2 : In YDSE path difference between the superposing waves can not be more than the distance between the slits.
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Solution
(b)Statement -1 is true, Statement-2 is true;Statement -2 is a correct explanation for Statement-1
DIRECTION: Each question contains STATEMENT-1 and STATEMENT-2. Choose the correct answer(ONLY ONE option is correct ) from the following-
Statement 1: In Young’s double slit experiment if wave length of incident monochromatic light is just doubled,number of bright fringe on the screen will increase.
Statement 2: Maximum number of bright lunge on the screen is inversely proportional to the wavelength of light used
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Solution
(a)Statement -1 is false, Statement-2 is true
DIRECTION: Each question contains STATEMENT-1 and STATEMENT-2. Choose the correct answer(ONLY ONE option is correct ) from the following-
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Solution
(b)Statement -1 is true, Statement-2 is true;Statement -2 is a correct explanation for Statement-1
DIRECTION: Each question contains STATEMENT-1 and STATEMENT-2. Choose the correct answer(ONLY ONE option is correct ) from the following-
Statement 1: In YDSE, if a thin film is introduced in front of the upper slit, then the fringe pattern shifts in the downward direction.
Statement 2 : In YDSE if the slit widths are unequal, the minima will be completely dark.
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Solution
(a)Statement -1 is false, Statement-2 is true
Interference was observed in an interference chamber when air was present. Now, the chamber is evacuated and if the same light is used, a careful observation will show
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Solution