Math, asked by megeetapradhan1863, 1 day ago

You project an image through a lens with a focal length of 19.7 cm If the object distance is 39.4 cm and it's height is 5.61 cm what is the height of the image

Answers

Answered by mahitomar2572
0

An object of height 6 cm is placed perpendicular to the principal axis of a concave lens of focal length 5 cm. Use lens formula to determine the position, size and nature of the image if the distance of the object from the lens is 10 cm.

Medium

Solution

verified

Verified by Toppr

Given : u=−10 cm f=−5 cm h

o

=6 cm

Using lens formula :

v

1

u

1

=

f

1

v

1

(−10)

1

=

−5

1

⟹v=−

3

10

=−3.33 cm (- sign shows that image is virtual)

Also m=

h

o

h

i

=

u

v

6

h

i

=

−10

3

−10

⟹h

i

=+2 cm (+ sign shows that image is erect)

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