A concave mirror of focal length 12 cm is placed at a distance of 60 c

1.	A concave mirror of focal length 12 cm is placed at a distance of 60 cm from a wall. How far from the wall an object be placed so that its sharp image formed by the mirror falls on the wall?
Answer» EXPLANATION: GIVEN, Focal LENGTH f=20cm Image distance, v=50cm from mirror formula, f1=v1+u1 ⇒ −201=−501+u1 u1=501−201 =50×2020−50 =1000−30 u=−3100cm

A concave mirror of focal length 12 cm is placed at a distance of 60 cm from a wall. How far from the wall an object be placed so that its sharp image formed by the mirror falls on the wall?

Answer»

EXPLANATION:

GIVEN,

Focal LENGTH f=20cm

Image distance, v=50cm

from mirror formula,

f1=v1+u1

⇒ −201=−501+u1

u1=501−201

=50×2020−50

=1000−30

u=−3100cm

Discussion

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A concave mirror of focal length 12 cm is placed at a distance of 60 cm from a wall. How far from the wall an object be placed so that its sharp image formed by the mirror falls on the wall?​

Focal LENGTH f=20cm

Image distance, v=50cm

from mirror formula,

f1=v1+u1

⇒ −201=−501+u1

u1=501−201

=50×2020−50

=1000−30

u=−3100cm

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A concave mirror of focal length 12 cm is placed at a distance of 60 cm from a wall. How far from the wall an object be placed so that its sharp image formed by the mirror falls on the wall?