In young's experiment, the upper slit is covered by a thin glass plate of refractive index 4 and of thickness 9% , where à is the wavelength of light used in the experiment. The 3 lower slit is also covered by another glass plate of thickness 2r & refractive index 2' as shown in figure. If 1, is the intensity at point P due to slits S, & S, each, then:
In young's experiment, the upper slit is covered by a thin glass plate of refractive index 4 and of thickness 9% , where à is the wavelength of light used in the experiment. The 3 lower slit is also covered by another glass plate of thickness 2r & refractive index 2' as shown in figure. If 1, is the intensity at point P due to slits S, & S, each, then:
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Transcribed Image Text:A) Intensity at point P is 41,
B) Two fringes have been shifted in upward direction after insertion of both the glass
plates together.
C) Optical path difference between the waves from S, & S, at point P is 2r.
D) If the source S is shifted upwards by a small distance d, then the fringe originally at
P after inserting the plates, shifts downwards by D
Transcribed Image Text:In young's experiment, the upper slit is covered by a thin glass plate of refractive index
4
and of thickness 9k , where à is the wavelength of light used in the experiment. The
3
lower slit is also covered by another glass plate of thickness 2r & refractive index ,
as
shown in figure. If 1, is the intensity at point P due to slits S, & S, each, then:
S,
S
d,
d,,D
>> d
の日の
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