Ask a Doubt
Request a call back

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

CBSE Class 10 Answered

An object is placed in front of a concave mirror of focal length 30 cm. The virtual image of the object is obtained at a distance 20 cm from the mirror. Calculate the position of the object.   Please explain briefly step by step
Asked by chpratik11 | 28 Jun, 2019, 09:22: PM
answered-by-expert Expert Answer
Focal length f=-30cm
Image distance v=20cm
object distance u=?
 
According to mirror formula
1 over v plus 1 over u equals 1 over f fraction numerator begin display style 1 end style over denominator begin display style 20 end style end fraction plus fraction numerator begin display style 1 end style over denominator begin display style u end style end fraction equals fraction numerator begin display style 1 end style over denominator begin display style negative 30 end style end fraction fraction numerator begin display style 1 end style over denominator begin display style u end style end fraction equals negative fraction numerator begin display style 1 end style over denominator begin display style 20 end style end fraction minus fraction numerator begin display style 1 end style over denominator begin display style 30 end style end fraction fraction numerator begin display style 1 end style over denominator begin display style u end style end fraction equals fraction numerator begin display style negative 3 minus 2 end style over denominator begin display style 60 end style end fraction fraction numerator begin display style 1 end style over denominator begin display style u end style end fraction equals fraction numerator begin display style negative 5 end style over denominator begin display style 60 end style end fraction u equals negative 12 c m
the object is placed at a distance of 12cm from the mirror.
Answered by Utkarsh Lokhande | 29 Jun, 2019, 07:51: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Physics
Is object distance always negative in both lens and mirrors?
Asked by nandanagnair | 17 Dec, 2023, 03:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
The image of a candle flame placed at a distance of 30 cm from a spherical lens is formed on a screen placed at a distance of 60 cm from the lens. If the height of the flame is 2.4 cm,find the height of its image 
Asked by namish1088 | 16 Nov, 2023, 08:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
what is concave mirror?
Asked by Shiwani.Sawant | 28 Jul, 2023, 09:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
A concave mirror has focal length of 20cm. At what distance from the mirror a 5cm tall object be placed so that it forms an image at 15cm from the mirror? Also calculate the size of the image formed.
Asked by anmol6745p | 16 Jul, 2023, 04:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
An object is kept at a distance of 15 cm from a (a) Convex mirror (b) Plane mirror The focal length of the convex mirror and the concave lens are 10 cm each. Draw the appropriate ray diagrams, showing the formation of image, in each of the three cases.
Asked by susrisangita792 | 02 Jun, 2023, 08:00: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Very Short Answer Type Questions Name two mirrors used in this fair shop. Name the mirror in which the size of image is small.
Asked by susrisangita792 | 01 Jun, 2023, 06:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
can a convex mirror ever form a real image? If yes, under what condition?  
Asked by supriyarakshit.npph | 31 May, 2023, 08:49: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
how to draw a ray diagram for concave mirror (i) Parallel to pricipal axis (ii) Passing through center of curvature
Asked by priyankakiran2017 | 24 May, 2022, 06:36: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
if you placed an object at (1) between 'C' and F and (2) F then find the position of image, size and nature of image formed by a concave mirrors ( with ray diagrams)
question image
Asked by Jethanleapon | 03 Oct, 2021, 09:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
When an object is placed between pole and focus of a convex mirror, then what is the image formed?
Asked by saswatm74002 | 15 Aug, 2021, 01:09: 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
×