NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1354  1357 of 2320
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Question number: 1354
» 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.  1.67 cm  
b.  0.5 cm  
c.  5.0 cm  
d.  1.5 cm 
Question number: 1355
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 
Question number: 1356
» Properties of Solids & Liquids » Elastic Behavior
Question
A uniform steel wire of density 7500 kg/m ^{3} is 2.5 m long and weighs 15.6 x 10 ^{3} kg. It extends by 1.25 mm when loaded by 10 kg. Calculate the value of young’s modulus of elasticity for steel.
Choices
Choice (4)  Response  

a.  2.3 × 10 ^{11} N/m ^{2}  
b.  19.6 × 10 ^{11} N/m ^{2}  
c.  2.96 × 10 ^{11} N/m ^{2}  
d.  Question does not provide sufficient data or is vague 
Question number: 1357
» 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. 
