If seperation between screen and source is increased by 2%. What would be the effect on the intensity?
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(a) increases by 4% (b) increases by 2% (c) decreases by 2% (d) decreases […]
A single slit Fraunhogger diffraction pattern is formed with white light. For what wavelength of light the third secondary maximum in the diffraction pattern coincides with the second secondary maximum in the pattern for red […]
In Young’s double slit experiment with sodium vapour lamp of wavelength 589 nm and the slits 0.589 mm apart, the half angular width of the central maximum is
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(a) sin⁻¹ 0.01 (b) sin⁻¹ […]
Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved […]
When the speed of electron beam used in Young’s double slit experiment is increased, then which among the following statements is correct?
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(a) Interference pattern will not be observed in case of […]
In the diffraction pattern of a single slit
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(a) All bands are uniformly bright (b) All bands are uniformly wide (c) Central band is narrower (d) Central band is wider
Correct Answer: […]
If white light is used in Young’s double slit experiment
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(a) No interference pattern is formed (b) White fringes are formed (c) Central bright fringe is white (d) Central bright fringe is coloured
A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance […]
The width of the diffraction band varies
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(a) Inversely as the wavelength (b) Directly as the width of the slit (c) Directly as the distance between the slit and the screen (d) […]
Huygen’s wave theory allows us to know
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(a) The wavelength of the wave (b) The velocity of the wave (c) The amplitude of the wave (d) The propagation of wave fronts
Correct […]
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