To see from submarine and the ship at the surface of water, we use:
Telescope
Microscope
Periscope
Prism
The ray of light after reflection from concave mirror passes through:
Centre
Principal focus
Pole
Radius
Totally reflecting prism is used in:
Binoculars
Periscope and binocular
In SI the unit of charge is:
Joule
Volt
Coulomb
Watt
The minimum value of angle of deviation is called:
Minimum angle
Incident angle
Angle of minimum deviation
None of these
