MyQuestionIcon

2

You visited us 2 times! Enjoying our articles? Unlock Full Access!

Mirror Formula and Magnification

If object is ...

Question

If object is placed at 60 cm before the concave mirror. The object moves with velocity 20 cm/sec towards the mirror. The magnification is -1/2 at initial position. And if magnification after 1 sec is – 1 find out the average velocity of the image for above 1 sec period.

A

10 cm/sec

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

20 cm/sec

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

15 cm/sec

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

5 cm/sec

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A
10 cm/sec

m = -v/u

Suggest Corrections

thumbs-up

1

Similar questions

Q. A plane mirror is approaching you at a speed of 10 cm/sec You can see your image in it. At what speed will your image approach you

Q. If an object is placed at a distance of 20cm from the pole of a concave mirror, the magnification of its real image is 3. If the object is moved away from the mirror by 10cm, then the magnification is -1.

Q. An object of

5 c m

is placed before a concave mirror at a distance of

40 c m .

If its focal length is

20 c m

then what is the magnification of the image.

Q. An object is placed at (i)

10 c m

5 c m

in front of a concave mirror of radius of curvature

15 c m

. Find the position, nature and magnification of the image in each case.

Q. The image of an object formed by a mirror is real, inverted and is of magnification

- 1

. If the image is at the distance of

30 c m

from the mirror, where is the object placed? Find the position of the image if the object is now moved

20 c m

towards the mirror. What is the nature of the obtained? Justify your answer with the help of ray diagram.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Mirror Formula and Magnification

PHYSICS

Watch in App

explore_more_icon

Explore more

Mirror Formula and Magnification

Standard IX Physics

Join BYJU'S Learning Program

CrossIcon