Reflection and Refraction of Light
Introduction:
Reflection can simply
be defined as the bouncing back of light when it strikes the medium on a plane.
Refraction can be defined as the process of the shift of light when it passes
through a medium leading to the bending of light. The light entering the medium
returns to the same medium.
Why
we cannot see objects in the dark?
a) temperature is low
b)air
is dense
c) light is absent
d) all of these
Why the objects are visible in light?
a) temperature is high
b) air is warm
c) light is present
d) all of thes
Explanation:Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that is perceived by the human eye.
Which of the following sense organ is used to see objects in the presence of light?
a)eye
b) medulla
c) nose d)ear
Which of the following receptor is use to see objects?
a) mechanoreceptor
b)sono-receptor
c) thermo-receptor
d) photoreceptor
Light is emitted from which of the following objects?
a) luminous
b) non-luminous
c) both of them
d) none of these
Explanation:Luminous objects are which emit light by their own. Examples: - Sun, flame of a burning candle.
