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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 double-slit experiment, interference fringes each have a width of 1 mm when Light of wavelength 5000 Å is used. Without changing the experimental arrangement, the Light source is replaced with another of wavelength 6000 Å. What will be the new fringe width?
a) 12 mm
b) 12 cm
c) 1.2 mm
d) 2.4 mm
Option c – 1.2 mm
In Young’s experiment, the ratio of intensities of a bright fringe to a dark fringe is 9 : 1. This indicates that:
a) The intensities contributed by the two slits at the screen are 5 units and 4 units respectively
b) The intensities from the two slits are 4 units and 1 unit respectively
c) The ratio of amplitudes of the waves is 4 : 1
d) The ratio of amplitudes of the waves is 8 : 1
Option b – The intensities from the two slits are 4 units and 1 unit respectively
In Young’s double-slit experiment, if one slit is partially covered so that it allows only half the Light intensity compared to the other slit, then:
a) The intensity of bright fringes decreases while the intensity of dark fringes increases
b) The intensities of both bright and dark fringes decrease
c) The intensities of both bright and dark fringes increase
d) The intensity of bright fringes decreases while dark fringes have zero intensity
Option a – The intensity of bright fringes decreases while the intensity of dark fringes increases
Young’s double-slit experiment provides experimental evidence that:
b) Light behaves as a particle
c) Light is neither a wave nor a particle
d) Light exhibits only particle nature
When the Young’s double-slit interference setup is transferred from air into vacuum, then:
a) The interference pattern vanishes
b) The fringe width remains unchanged
c) The fringe width increases
d) The fringe width decreases
Option c – The fringe width increases
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Also, check out:
- Class 11 Physics Midterm Question Paper
- Class 11 ISC Physics Solutions
- Physics Viva Questions Class 11
