Wave Optics (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 10  14 of 64
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Question number: 10
» Wave Optics » Polarization
Question
Unpolarised light of intensity 32 Wm ^{2} passes through three polarizers such that the transmission axis of the last polarizer is crossed with the first. If the intensity of the emerging light is 3 Wm ^{2}, at what angle will the transmitted intensity be maximum?
Choices
Choice (4)  Response  

a.  15° 

b.  75° 

c.  35° 

d.  45° 

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Question number: 11
» Wave Optics » Interference
Question
The equation of two light waves are , . The ratio of maximum to minimum intensities produced by the superposition of these waves will be
Choices
Choice (4)  Response  

a.  1: 7 

b.  49: 1 

c.  7: 1 

d.  1: 49 

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Question number: 12
» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum
Question
Two spectral line of sodium D _{1} & D _{2} have wavelengths of approximately 5890 Å and 5896 Å. A sodium lamp sends incident plane wave on to a slit of width 2 micrometer. A screen is located at 2 m from the slit. Find the spacing between the first maxima of two sodium lines as measured on the screen.
Choices
Choice (4)  Response  

a.  9 × 10 ^{4} m 

b.  10 ^{4} m 

c.  9 × 10 ^{4} 

d.  All of the above 

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Question number: 13
» Wave Optics » Brewster's Law
Question
When light of a certain wavelength is incident on a plane surface of a material at a glancing angle 30°, the reflected light is found to be completely plane polarized. Determine refractive index of given material –
Choices
Choice (4)  Response  

a. 


b.  2 

c. 


d. 


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Question number: 14
» Wave Optics » Brewster's Law
Question
A light has amplitude A and angle between analyser and polariser is 60°. Light transmitted by analyser has amplitude
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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