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WorksheetsLight chapter Quiz
Total questions: 10
Worksheet time: 3mins
student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure:
1
2
3
4
No matter how far you stand from a spherical mirror, your image appears erect. The mirror may be ………. .
Concave mirror
Convex lens
Diverging Mirror
Plane mirror
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is
-20
-30
-40
-60
A ray of light is travelling from a rarer medium to a denser medium. While entering the denser medium at the point of incidence, it
Goes straight into the second medium
Bends towards the normal
Bends away from the normal
Does not enter at all
If the power of a lens is – 2 D, what is its focal length?
-50cm
+100cm
+50cm
-100cm
Point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm. The image will form at:
At focus
At the pole
Behind the mirror
At infinity
Magnifying power of a concave lens is
Always <1
Always > 1
Can have any value
Always = 1
The diagrams showing the correct path of the ray after passing through the
II and III only
I and II only
I, II and III
I, II and IV
A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be
Greater than unity
Less than unity
Equal to unity
Zero
In torches, search lights and headlights of vehicles the bulb is placed.......
between the pole and the focus of the reflector
very near to the focus of the reflector
between the focus and centre of curvature of the reflector
at the centre of curvature of the reflector
