What are the uses of kaleidoscope?
Important Questions on When Light Reflects
A device containing two plane mirrors which gives us a higher view than normal is a
How are the two plane mirrors in a periscope arranged with respect to the ends of the tube ?
A tall device which contains plane mirrors can be used to see over the heads of crowd (say, as in a football match).
(a) What is the name of this device?
(b) How many plane mirrors does it use?
(c) On what principle does this device work?
What is a periscope? How many plane mirrors are there in a periscope?
Look at the diagram given below. It explains the working of a periscope. A periscope makes use of plane mirrors. A simple periscope can be used to see over obstacles such as walls.
a) What is the nature of image formed when we see through a periscope?
b) Give reason for the question asked in part ‘a’.
c) Will the image be larger, smaller or of the same size as the object? Why?
How are the two plane mirrors in a periscope arranged with respect to one another ?
Describe the functioning of the periscope. Also, tell that how many mirrors are there in a periscope.
Name a device which can be used to see things on the other side of a high wall (without having to climb over the wall).
