Question

use
Fill in the missing details in below table.
State type
of mirror or
lens used
(a)
Rear view in vehicles
(?)
To observe minute parts of (C)
watch by watch repairer
(?)
State position, nature and size of
an image when object placed at
distance equal to its focal length.
(b)
(?)
(d)
(?)
C​

Answer 1

Answer:

a - convex mirror

b- diminished , virtual and errect

c- convex lens

d- infinity

Answer 2

Question :

Fill in the missing details :

• State type of mirror or lens used (a) Rear view in vehicles (?)
• To observe minute parts of (b) watch by watch repairer (?)
• State position,(c) (?) nature (d) (?) and size(e) (?) of an image when object placed at distance equal to its focal length.

Answer :

a.

• The type of mirror or lens which is used in rear view mirror in vehicles is Convex Mirror.

This is because , convex mirror produces virtual , erect and diminished image of the vehicle behind irrespective of its distance from the mirror , allowing the driver to view a large area of traffic behind.

b.

• To observe minute parts of convex mirror watch by watch repairer.

c.

• The position of the image when object placed at distance equal to its focal length is at infinity.

d.

• The nature of the image when object placed at distance equal to its focal length is real and inverted.

e.

• The size of the image when object placed at distance equal to its focal length is highly enlarged.

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