Wave OpticsYoung's Double Slit Experiment (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 1  4 of 17
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Question number: 1
» Wave Optics » Young's Double Slit Experiment
Question
In Young’s double slit experiment the two slits are illuminated by light of wavelength 5890 Å and the angular separation between the fringes obtained on the screen is 0.2°. If the whole apparatus is immersed in water then the angular fringe width will be, if the refractive index of water is 4/3?
Choices
Choice (4)  Response  

a.  0.15° 

b.  15° 

c.  30° 

d.  0.30° 

Question number: 2
» Wave Optics » Young's Double Slit Experiment
Question
The width of one of the two slits in a Young’s double slit experiment is double of the other slit. Assuming that the amplitude of the light is coming from a slit is proportional to slitwidth. Find the ratio of the maximum to the minimum intensity in the interference pattern.
Choices
Choice (4)  Response  

a.  9: 1 

b.  16: 1 

c.  34: 1 

d.  4: 1 

Question number: 3
» Wave Optics » Young's Double Slit Experiment
Question
Interference fringes were produced in Young’s double slit experiment using light of wave length 5000 Å. When a film of material 2.5 × 10 ^{3} cm thick was placed over one of die slits, the fringe pattern shifted by a distance equal to 20 fringe width. The refractive index of the material of die film cannot be
(1) 1.25 (2) 1.33
(3) 1.5 (4) 1.4
Select the correct answers and mark it according to the following codes:
Codes:
Choices
Choice (4)  Response  

a.  1 and 3 are correct 

b.  1,2 and 3 are correct 

c.  2 and 4 are correct 

d.  1 and 2 are correct 

Question number: 4
» Wave Optics » Young's Double Slit Experiment
Question
The intensity of the light coming from one of the slits in a young’s double slit experiment is double the intensity from the other slit. Find the ratio of the maximum intensity to the minimum intensity in the interference fringe pattern observed.
Choices
Choice (4)  Response  

a.  9: 1 

b.  34: 1 

c.  4: 1 

d.  16: 1 
