Which mirror is used as shaving mirror
Concave
Convex
Plane
None of these
Light sources emit _______ and energy.
Water
Heat
Chemical
Physical
Seven colours painted in the same order and proportion of Spectrum is called.
Colour disc
Colour band
Rise
Band
The phenomena of returning of light rays that fall on a smooth surface
Refraction
Adsorption
Absorption
Reflection
The Mirror on which the reflecting surface is curved outward
Image that cannot be formed on a screen
Real
Stringed
Erect
Virtual
A surface which reflects light is called __________.
Plance
Path
Mirror
Arris
Time required by light to travel from moon to earth
4 second
1.3 Second
8 Second
1.3 Hour
The colour of an object that reflects all the colours is __________
Green
Black
White
Yellow
There are _________ colours in a rainbow
4
5
6
7