Question Text
Question 1 :
If an object is placed symmetrically between two plane mirrors inclined at an angle of $72^{\circ}$, then the total number of images formed is:<br/>
Question 5 :
Choose the proper food from following, to keep our eyes healthy:
Question 7 :
Clouds are white because of light scattering off of water droplets.
Question 8 :
Assertion: A normal human eye can clearly see all the objects at the different distance.
Reason: The human eye has the capacity to suitably adjust the focal length of its lens to a certain extent.
Question 11 :
State whether true or false :The number of cones in the human eye are more than the number of rods.
Question 12 :
If an object is placed symmetrically between two plane mirrors inclined at an angle of $72^{\circ}$, then the total number of images formed is:<br/>
Question 13 :
Splitting of light into its constituent colours is known as :<br/>
Question 14 :
A tube containing two or more plane mirrors, inclined at certain angles to each other, is called a ________. Fill in the blanks.<br/>
Question 19 :
Howmany images of a candle will be formed if it is placed between two parallelplane mirrors separated by 100 cm?
Question 20 :
How many rectangular mirrors are there in kaleidoscope which yields to pattern filling entire field?<br>