Question

a convex lens forms a real image two times larger than the object on a screen object and screen are mood until the image becomes four times the size of the object if the shift of the object is faster than​

Answer 1

Answer:

ANSWER

3x

1

+

x

1

=

f

1

3x

4

=

f

1

……..(1)

⇒

2(6+x)

1

+

6+x

1

=

f

1

⇒

2(6+x)

3

=

f

1

…….(2)

From equation (1) & (2)

3x

4

=

2(6+x)

3

⇒9x=48+8x

x=48

Shift of screen=3x−2(6+x)

=3×48−2(6+48)

=36cm

Answer is 36cm

Answer 2

Answer:

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a convex lens forms a real image two times larger than the object on screen object and screen are moved until the image becomes four times the size of object if the shift of the object is 5 cm then