Question Text
Question 2 :
The rising and setting of sun appear red because of : 
Question 6 :
Why do high rise buildings have a red light on the top of the building?
Question 8 :
CV Raman got the Nobel Prize for his experiment on :
Question 9 :
In the white light of sun, maximum scattering by the air molecules present in the earth's atmosphere is for:<br>
Question 11 :
The bluish colour of water in deep sea is due to:<br/>
Question 12 :
Long-sightedness is caused by the eyeball being too short. It can be corrected by the use of a:
Question 13 :
At sun rise or at sun set the sun appears to be reddish while at mid day it looks white. This is because
Question 15 :
Larger particles scatter light at the ____ end of the spectrum the least. <br/>
Question 16 :
Assertion: A Diamond sparkles more than a glass imitation cut to the same shape.
Reason: The refractive index of diamond is less than that of glass.
Question 17 :
Assertion: The setting sun appears to be red. <br>Reason: Scattering of light is directly proportional to the wavelength.
Question 18 :
Which of the following phenomena cannot be explained by scattering of light ?
Question 20 :
Assertion: In the absence of atmosphere the sky would appear black.<br/>
Reason: Atmosphere scatters the light and hence we get blue colour.
Question 21 :
A normal eye is not able to see objects closer than $25$cm because?
Question 22 :
The process of re-emission of absorbed light in all directions with different intensities by the atom or molecule is called ____________.
Question 24 :
The defective condition of accommodation of the eye in which distant objects are clearly seen but near objects are indistinct is<br>