Question 4 :
Long-sightedness is caused by the eyeball being too short. It can be corrected by the use of a:
Question 5 :
On passing white light through a glass prism. Whichcolour ray will deviate maximum towards its base?
Question 6 :
The angle between the two refracting surface of a prism is called angle of :<br/>
Question 8 :
State whether true or false :Myopia is caused due to the high converging power of the eye lens.
Question 9 :
The path of beam of light becomes _____ in a colloidal solution.
Question 10 :
Some stars appear red in colour and some blue in colour. Which one of the statements is true?<br>
Question 11 :
Which of the following observations cannot be explained by Tyndall Effect?
Question 12 :
Why are red coloured lights are used in traffic signals to stop the vehicles?
Question 13 :
When Astronauts fly at higher altitude, the sky appears dark because ;
Question 14 :
Name the prism required for obtaining the spectrum of infra red radiation<br/>
Question 15 :
Which of the following quantities changes during the process of scattering?
Question 16 :
In the white light of sun, maximum scattering by the air molecules present in the earth's atmosphere is for:<br>
Question 18 :
Larger particles scatter light at the ____ end of the spectrum the least. <br/>
Question 23 :
Which of the following phenomena cannot be explained by scattering of light ?
Question 24 :
Assertion: Incoming light reflected by earth is partially polarized.
Reason: Atmospheric particle polarize the light.
Question 25 :
At sunrise or sunset, the sun appears to be reddish white. This is because :
Question 26 :
During scattering of light, the amount of scattering is inversely proportional to ________ of wavelength of light.
Question 27 :
Assertion: Fine particles in atmosphere scatter the light of shorter wavelength more.
Reason: Sky appears blue.
Question 29 :
Assertion: The setting sun appears to be red.
Reason: Scattering of light is directly proportional to the wavelength.
Question 30 :
What characteristic property of light is responsible for the blue colour of the sky?<br>