Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

(a) Find the position of image formed when an object of size 1 cm is placed at a distance of 15 cm from a concave mirror of focal length 10 cm. (b) What is the focal length of a plane mirror?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

(a) u = -15 cm, v =?, f = -10 cm

Now putting these values in the mirror formula:

1/v + 1/u = 1/f

We get: 1/v + 1/-15 = 1/-10

1/v = 1/15 - 1/10

1/v = -1/30

v = -30 cm

So, image distance = -30 cm

Thus, the position of image is 30 cm to the left side of mirror or 30 cm in front of mirror.

(b) The focal length of the plane mirror is infinity.

Answered by | 04 Jun, 2014, 03:23: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Physics
the angle between an incident ray and the reflecting surface is 55°. what will be the total angle between the incident and reflected ray?
Asked by ruchipandey20071978 | 11 May, 2023, 06:53: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
a concave mirror has a radius of curvature of 0.4m. find the position and size of the image of an object placed 0.2m high and is placed 0.8m in front of a concave mirror.
Asked by priyanshdhiman2008 | 17 Mar, 2023, 09:17: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
An object at distance of 24cm is placed in front of Concave. mirror having focal length 10cm. find image distance. Nature of image and magnification
Asked by piustoppo9thb | 24 Jun, 2022, 09:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
if a plane mirror is rotated by an angle of theta by how much will the angle between the incident and the reflected ray change?
Asked by priyankakiran2017 | 22 Jun, 2022, 07:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Mirror formula
Asked by topperlearningforcontent | 02 Feb, 2022, 03:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
The distance between the real object and its image in a convex mirror of focal length 12 cm is 32 cm. the size of the object is 1cm. the object distance will be
Asked by bibektripathy17 | 15 Jun, 2021, 09:13: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
when we reverse the image then image will formed or not
Asked by vkpriya1228 | 24 Apr, 2021, 08:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
A REAL OBJECT IS LOCATED IS LOCATED AT ZERO END OF A METER STICK. A CONCAVE MIRROR LOCATED AT 100 cm END OF THE METER STICK FORMS AN IMAGE OF THE OBJECT AT THE 70cm POSITION. A CONVEX MIRROR PLACED AT THE 60cm POSITION FORMS A FINAL IMAGE AT THE 10 cm POINT WHAT IS THE RADIUS OF CURVATURE OF THE CONVEX MIRROR?
question image
Asked by iraza2663 | 21 Apr, 2021, 09:18: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
A concave mirror produces three times magnified (enlarged) real image of an object placed at 10cm in front of it . Where is the image located?
Asked by grexiemalinnie | 17 Jan, 2021, 09:15: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
why presently sign convention is known as new sign convention
Asked by alimohd1487 | 03 Jan, 2021, 06:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×