Question 2 :
When white light passes through a dispersive medium, it breaks up into various colours. Which of the following is true?

Question 3 :
Why there are two parallel plane mirrors in a barber shop?

Question 4 :
At what angle the rectangular mirrors are set to each other in Kaleidoscope?<br/>

Question 5 :
For a normal eye, in case of an adult, the least distance of distinct vision is :

Question 6 :
The least distance of distinct vision for a young adult with normal vision is about

Question 8 :
Which of the following colour of light undergoes the maximum deviation while passing a glass prism ?

Question 10 :
For a healthy eye, the least distance of distinct vision and maximum distance will be:

Question 11 :
Match&#160;the columns:<br/>i)visual aids&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; a)used for minor eye defect or&#160;partial blindness.<br/>ii)electronic aids&#160;&#160;&#160; b)includes cassettes,tape recorders,talking&#160;books.<br/>iii)auditory aids&#160;&#160;&#160;&#160;&#160; c)used for people having little vision.<br/>iv)optical aids&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; d)available for performing&#160;computational tasks.<p></p><p></p>

Question 13 :
Far point of a person is $$5 m$$. In order that he has normal vision what kind of spectacles should be use

Question 14 :
The phenomenon of splitting of light into its component colours is _________.

Question 15 :
Assertion: Different colours travel with different speed in vacuum. <br>Reason : Wavelength of light depends on refractive index of medium.

Question 16 :
Which of the following is Not an advantage of having two eyes?

Question 18 :
With an object between those, if the angle &#160;between two plane mirrors is acute, the number of images formed will be:

Question 19 :
With an object between those, if the angle &#160;between two plane mirrors is acute, the number of images formed will be: