Inter 1st Year Physics Model Paper. We covered all the Inter 1st Year Physics Model Paper in this post for free so that you can practice well for the exam.
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Inter 1st Year Physics Mock Test for Students
In Young’s experiment interference fringes of width, 1mm each is observed when the light of wavelength 5000 A° is used. Keeping the setup unaltered, if the source is replaced by another source of wavelength 6000A°, the fringe width will be :
(A) 12 mm
(B) 12 cm
(C) 1.2 mm
(D) 2.4 mm
Option c – 1.2 mm
In Young’s experiment, the intensity ratio of bright and dark fringe is 9 : 1, this implies that :
(A) the intensities at the screen due to the two slits are 5 units and 4 units respectively
(B) the intensities of the two slits are 4 units and 1 unit respectively
(C) the amplitude ratio is 4 : 1
(D) the amplitude ratio is 8 : 1
Option b – the intensities of the two slits are 4 units and 1 unit respectively
If one of the two slits of Young’s double slit experiment is painted over so that it transmits half the light intensity of the other then :
(A) the intensity of maxima decreases while the intensity of minima increases
(B) the intensity of both maxima and minima decreases
(C) the intensity of both maxima and minima increases
(D) the intensity of maxima decreases while the minima have zero intensity
Option a – the intensity of maxima decreases while the intensity of minima increases
Young’s experiment establishes that :
(A) light consists of waves
(B) light consists of particles
(C) light is neither particle nor a waves
(D) light is both particle and wave
Option a – light consists of waves
Young’s double slit set up for interference is shifted from air to vacuum. Then, the :
(A) fringe pattern disappears
(B) fringe width remains the same
(C) fringe width increases
(D) fringe width decrease
Option c – fringe width increases
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