Question 2 :
The phenomenon by which stars recedes from each other is explained by 

Question 3 :
Which of the following phenomenon can explain quantum nature of light

Question 4 :
When the light source is moving away, the Doppler effect for light is known as:

Question 5 :
Light is a form of _______ that we can detect with our ________ .

Question 6 :
For the propagation of light wave, medium is&nbsp;required. This is according to<br>

Question 7 :
A plane wave front falls on a convex lens. The&#160;emergent wave front:<br/>

Question 8 :
The wave front due to a source situated at infinity is :

Question 9 :
Two periodic waves of intensities I1 and I2 pass<br>through a region at the same time in the same<br>direction. the sum of the maximum and<br>minimum intensities is - <br><br><br>

Question 10 :
The shape of wave front at a very large distance from source is ______

Question 15 :
Fill in the blanks:<div>According to Newton, different colors of light are&#160;due to the difference in _______ of the corpuscles.</div>

Question 17 :
The inability of a lens to bring all the rays coming from a point object to focus at one single point is called<br>

Question 18 :
<span>An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz. What is the frequency of the microwave measured by the observe? (speed of light=$3\times { 10 }^{ 8 }\ m{s}^{ -1 }$</span><br/>

Question 21 :
Newton postulated his corpuscular theory of light on the basis of:

Question 22 :
The phase change in reflected wave, when light&nbsp;wave suffers reflection at the interface from air to&nbsp;glass is<br>

Question 24 :
Match list A and list B accurately :<br/>List A &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; List B<br/>a) spherical wave front &#160; &#160; &#160; &#160; &#160; &#160;e) linear source<br/>b) plane wave front &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160;f) point light source<br/>c) cylindrical wave front &#160; &#160; &#160; &#160; &#160;g) at infinite distance<br/><br/>

Question 26 :
Who amongst the following used corpuscular theory to explain the nature of light?

Question 28 :
1: Primary waves can travel in all directions in an ether<br/>2: Secondary waves can travel only in backward in an ether<br/>

Question 29 :
The speed at which the current travels in a conductor, is nearly.

Question 30 :
Which experiment seemed to make it clear that light propogates as a wave?

Question 32 :
A : The phase difference between any two points on a wave front is zero<br/>R : From the source light, reaches every point on the wave front in the same time.<br/>

Question 33 :
When the light source is approaching, the Doppler effect for light is known as:

Question 34 :
Which of the following statements about the behaviour of light is not correct?

Question 35 :
The wavelength of light visible to eye is of the order of&nbsp;

Question 36 :
Which of the following is correct for light diverging from a point source ?

Question 38 :
The wave theory of light, in its original form, was first postulated by.<br>

Question 39 :
If a star emitting yellow light is accelerated towards earth, then to an observer on earth it will appear?

Question 40 :
Which of the following phenomena can be used to analyse a beam of light into its component wavelength?

Question 45 :
During the $19th$ century, light was considered to be a stream of particles called :