Class 12 Physics Wave Optics Important Questions. We covered all the Class 12 Physics Wave Optics Important Questions in this post for free so that you can practice well for the exam.
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Class 12 Physics Wave Optics QnA for Students
An interference pattern of monochromatic light consists of
(A) alternating bright and dark bands
(B) only bright bands
(C) only dark bands
(D) colored bands
Option a – alternating bright and dark bands
Which one of the following necessary conditions for producing persistent observable interference in light is incorrect?
(A) The two sources should emit waves continuously of the same wavelength
(B) The two sources should be coherent
(C) Two sources should be very close and must be very narrow.
(D) The amplitudes of the waves from two sources should be unequal.
Option d – The amplitudes of the waves from two sources should be unequal
If the two light waves of the same amplitude ‘a’ traveling through a medium arrive at a point in opposite phase then the resultant amplitude at that point is :
(A) Zero
(B) 2a
(C) 3a
(D) 4a
Option a – Zero
The intensities of superimposing sources are I and 4 I. Then the maximum and minimum intensities in the pattern are :
(A) 9 I and 3I
(B) 5 I and 3 I
(C) 9 I and I
(D) 2 I and I
Option c – 9 I and I
When petrol drops from a vehicle fall over rainwater on the road, colors are seen because of :
(A) dispersion of light
(B) absorption of light
(C) scattering of light
(D) interference of light
Option d – interference of light
The intensity ratio of maxima and minima is infinite, and the ratio of the amplitudes of the two sources is :
(A) unity
(B) infinite
(C) two
(D) can not be predicated
Option d – can not be predicated
If the two light waves of the same amplitude ‘a’ traveling through a medium arrive at a point in the same phase then the resultant intensity at that point is :
(A) a²
(B) 2a²
(C) 3a²
(D) 4a²
Option a – a²
We covered all the class 12 physics wave optics important questions above in this post for free so that you can practice well for the exam.
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