Wave Optics (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 37  41 of 64
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Question number: 37
» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum
Question
The first diffraction minima due to a single slit diffraction is at θ = 30° for a light of wavelength 5000 Å. The width of the slit is
Choices
Choice (4)  Response  

a.  1.0 × 10 ^{5} cm 

b.  1.25 × 10 ^{5} cm 

c.  2.5 × 10 ^{5} cm 

d.  5 × 10 ^{5} cm 

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Question number: 38
» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum
Question
A diffraction pattern is produced by a single slit of width 0.5mm with the help of a convex lens of focal length 40cm. If the wavelength of light used is 5896A. Then the distance of first dark fringe from the axis will be
Choices
Choice (4)  Response  

a.  0.047 mm 

b.  0.047 m 

c.  47 cm 

d.  0.047 cm 

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Question number: 39
» Wave Optics » Young's Double Slit Experiment
Question
In Young’s double slit experiment, carried out with light of wavelength λ = 5000 Å, the distance between the slits is 0.2 mm and the screen is at 200 cm from the slits, The central maximum is at x = 0. The third maximum will be at
Choices
Choice (4)  Response  

a.  1.5 cm 

b.  5.0 cm 

c.  1.67 cm 

d.  0.5 cm 

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Question number: 40
» Wave Optics » Polarization
Question
V _{0} and V _{E} represent the velocities, µ _{0} and μ _{E} the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then
Choices
Choice (4)  Response  

a.  if the crystal is calcite 

b.  if the crystal is quartz 

c.  if the crystal is quartz 

d.  if the crystal is calcite 

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Question number: 41
» Wave Optics » Wavefront
Question
In the given diagram, CP represents a wavefront and AO & BP, the corresponding two rays. Find the condition on θ for constructive interference at P between the ray BP and reflected ray OP
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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