Given below are two statements: 
 

Statement I: The maximum intensity in YDSE is four times the intensity due to each slit when they are identical.
Statement II: The phase difference between the interfering waves is \(2n\pi\) at the position of maxima where n = 0, 1, 2,...
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.

Subtopic:  Young's Double Slit Experiment |
From NCERT
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Given below are two statements: 
 

Statement I: No sustained interference pattern is obtained when two electric bulbs of the same power are taken.
Statement II: Phase difference between waves coming out of electric bulbs is not constant.
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.

Subtopic:  Superposition Principle |
From NCERT
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Given below are two statements: 
 

Statement I: When a thin transparent sheet is placed in front of one of the slits in YDSE, the fringe of zero-order shifts to some other position
Statement II: On placing this transparent sheet in front of a slit, the position of zero path difference on the screen changes.
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.
 

Subtopic:  Young's Double Slit Experiment |
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Given below are two statements: 
 

Statement I: Light of different colours travel at different speeds in a vacuum
Statement II: Speed of light depends on the mechanical properties of the medium.
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.

Subtopic:  Superposition Principle |
From NCERT
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Given below are two statements: 

Assertion (A): Nicol prism is used to produce and analyze plane polarised light.
Reason (R): Nicol prism reduces the intensity of the light to zero.
  
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

Subtopic:  Polarization of Light |
 57%
From NCERT
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In the following question, a statement of assertion (A) is followed by a statement of the reason (R)

A : If the background of two macroscopic objects is blue, then they are resolved well by microscope.

R : Resolving power is inversely proportional to the wavelength of light used.

1.  If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).

2.  If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

3.  If Assertion is a true statement but Reason is false, then mark (3).

4.  If both Assertion and Reason are false statements, then mark (4).

 

Subtopic:  Resolving Power of Optical Devices (OLD NCERT) |
 79%
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Given below are two statements: 

 
Statement I: On increasing the phase difference from \(\frac{\pi}{3} \) to \(\frac{\pi}{2}\) in YDSE, the intensity decreases by \(\frac{1}{3}\)rd.
Statement II: \(=4 \mathrm{I}_0 \quad \cos ^2 \frac{\theta}{2} \) with usual symbol meanings.
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.
  
Subtopic:  Superposition Principle |
From NCERT
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In a YDSE, let X and Y be the upper and lower slits. A thin film of thickness t and refractive index μ is placed in front of X. Let β = fringe width. The central maximum will shift 

1.  Downward

2.  Upward

3.  By μ-1tβλ

4.  Both (2) & (3)

Subtopic:  Young's Double Slit Experiment |
 71%
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Huygen's principle for secondary wavelets may be used to:

1. explain Snell's law.
2. find the velocity of light in vacuum.
3. find a new position of a wavefront.
4. both (1) & (3) are correct.

Subtopic:  Huygens' Principle |
 71%
From NCERT
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In YDSE, an electron beam is used to obtain an interference pattern. If the speed of electrons is increased:

1. No interference pattern will be observed.
2. Distance between two consecutive fringes remains the same.
3. Distance between two consecutive fringes will decrease.
4. Distance between two consecutive fringes will increase.
Subtopic:  Young's Double Slit Experiment |
From NCERT
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