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WorksheetsLight class 8
Total questions: 15
Worksheet time: 8mins
A smooth shining surface, which rebounds the light back in same or in different direction, is called
Mirror
Incident ray
Lens
Idealisation
Front balged part of the eyeball is called
PUPIL
CORNEA
RETINA
IRIS
The splitting of white light into its seven constituent colours is called
refraction
dispersion
deviation
reflection
The iris is the coloured part of the eye
true
false
What makes objects visible ?
the absorption of light by objects
the reflected light from the object
the total internal reflection taking place in an object
If the angle of incidence of light falling on a plane mirror is 30°, what will be the angle of reflection?
60°
30°
55°
40°
When we stand in front of our dressing table, our left hand seems to be right and right seems to be left. This is called
mirage
Up -side down phenomenon
Left-right confusion
Lateral inversion
Angle of incidence is always
equal to angle of reflection
equal to angle of refraction
more than angle of reflection
less than refraction
The angle of reflection is equal to the angle of incidence.
sometimes
always
never
under special case
If you are standing 2m away from a plane mirror the distance between you and your image are
2m
4m
6m
8m
the lens focuses light on the back of the eye, on a layer called
retina
optic nerves
pupil
iris
The impression of an image does not vanish immediately from the retina.It persits there for about ___________ of a second.
1/16 th
1/5 th
1
6
An interesting feature of a ____________ is that you will never see the same pattern again.
periscope
telescope
kaledioscope
mirror
sunlight called white light consits of __________________
colours
1
5
0
7
Diffused / irregular reflection takes place from
rough surface
smooth surface
