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ICSE Class 8 Physics Question Paper. We covered all the ICSE Class 8 Physics Question Paper in this post for free so that you can practice well for the exam.
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ICSE Class 8 Physics Mock test for Students
Two coherent waves interfere with amplitudes in the proportion 5 : 1. What will be the ratio of maximum intensity to minimum intensity?
a) 25 : 1
b) 9 : 4
c) 4 : 9
d) 6 : 5
Option b – 9 : 4
The optical path difference between two interfering Light waves at a point is 2945 Å. Which wavelength would result in destructive interference at that point?
a) 0.2945 micron
b) 0.5890 micron
c) 0.6000 micron
d) 0.5420 micron
Option b – 0.5890 micron
In a stable and well-defined interference pattern, the central fringe appears as:
a) completely dark
b) completely bright
c) partially dark
d) continuously varying in brightness
Option b – completely bright
Who was the first to experimentally demonstrate the phenomenon of interference of Light?
a) Huygens
b) Young
c) Fresnel
d) Newton
Option b – Young
A point lies at distances of 6.5 cm and 6.65 cm from two coherent sources. If the wavelength of Light used is 5000 Å, what will be the nature of illumination at that point?
a) Bright
b) Dark
c) Alternately bright and dark
d) Cannot be determined
Option a – Bright
The path difference between two identical waves reaching a point differs by 93 wavelengths. If the actual path difference is 0.0465 mm, what is the wavelength of the Light used?
a) 5000 Å
b) 4971 Å
c) 3940 Å
d) 2000 Å
Option a – 5000 Å
Two monochromatic Light waves with amplitudes A and 2A interfere at a point with a phase difference of 60°. The resulting intensity at that point is proportional to:
a) 7A²
b) 3A²
c) A²
d) 9A²
Option a – 7A²
A point will appear dark when two waves arrive there with a path difference equal to:
a) 15 wavelengths
b) 27 wavelengths
c) 7/2 wavelengths
d) 1/7 wavelength
Option c – 7/2 wavelengths
An interference pattern is attempted using two candle flames as sources. What type of interference pattern is observed?
a) No interference
b) Sustained interference
c) Temporary interference
d) Steady interference
Option a – No interference
We covered all the ICSE Class 8 Physics question paper above in this post for free so that you can practice well for the exam.
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