Solution of S Chand Physics Class 10. We covered all the Solution of S Chand Physics Class 10 in this post for free so that you can practice well for the exam.
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S Chand Physics Class 10 Mock Test for Students
In a biprism experiment, 60 fringes were observed with sodium light of wavelength 6000 Å. Keeping the same arrangement, if sodium light is replaced by mercury light using a green filter of wavelength 5000 Å, how many fringes will be then observed?
(A) 60
(B) 65
(C) 72
(D) 77
Option c – 72
The distance between the successive bright bands in the biprism experiment is 0.32 mm when the red light of wavelength 6400 A° is used. By how much will this distance change if blue light of wavelength 4800 A° is used with the same setting?
(A) 0.24 mm
(B) 0.16 mm
(C) 0.8 mm
(D) 0.08 mm
Option d – 0.08 mm
In a biprism experiment, the bandwidth is found to be increased by 25% of the initial when the distance between the slit and the focal plane of the eyepiece is increased by 20 cm. The original distance between the slit and the eyepiece will be :
(A) 60 cm
(B) 80 cm
(C) 100 cm
(D) 120 cm
Option b – 80 cm
In a biprism experiment, the distance between the third and sixth dark fringes on the same side of the central bright fringe is 4.5 mm. The fringe width is :
(A) 2 mm
(B) 1 mm
(C) 1.5 mm
(D) 3 mm
Option c – 1.5 mm
The fringe width in a biprism experiment is 0.32 mm when the red light of wavelength 6400 A° is used. source of blue light of wavelength 4000 A° is If used with the same setting, then the percentage change in the fringe width :
(A) 62.5%
(B) 50%
(C) 37.5%
(D) 27.5%
Option c – 37.5%
If the distance between the slit and the eyepiece is increased by 20% other things remain the same, and the width of the fringe will :
(A) Decrease by 20%
(B) Increase by 20%
(C) Increase by 10%
(D) Remains the same
Option b – Increase by 20%
To obtain distinct interference in biprism. experiment, the refracting edge of biprism must be :
(A) Approximately parallel to the broad slit
(B) exactly parallel to the broad slit
(C) Perpendicular to narrow slit
(D) Exactly parallel to the narrow slit
Option d – Exactly parallel to the narrow slit
In a biprism experiment for the light of which color the fringe width will be maximum :
(A) Violet
(B) Green
(C) Yellow
(D) Red
Option d – Red
On increasing the refracting angle of biprism from 0° to 179°, the effect on the fringe pattern will be :
(A) Fringes will come nearer
(B) Fringes will spread
(C) No effect on the fringe pattern
(D) No fringe pattern will be observed
Option b – Fringes will spread
In the determination of the distance between the two virtual sources in the biprism experiment, the eyepiece is moved away from the slit so that its distance from the slits is :
(A) less than four times the focal length of the lens
(B) less than two times the focal length of the lens
(C) equal to the focal length of the lens
(D) more than four times the focal length of the lens
Option d – more than four times the focal length of the lens
In Fresnel’s biprism experiment, the separation of two narrow slits is doubled. In order to maintain the same spacing of the fringes, the distance D of the screen from the slits must now be altered to about
(A) D
(B) 2D
(C) D/2
(D) 4D
Option b – 2D
In Fresnel’s biprism experiment, if one slit is covered with black opaque paper then,
(A) The fringes will become broader
(B) The fringes will become darker
(C) The fringes will become narrower
(D) No fringes will be formed
Option d – No fringes will be formed
What happens to interference pattern if biprism is rotated about a horizontal axis :
(A) Fringe width decreases
(B) Fringe width increases
(C) Position of dark and bright fringes get interchanged
(D) Fringes disappear
Option d – Fringes disappear
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