The image of a real object formed by a concave mirror is twice the size of the object. The focal length of the mirror is 20 cm. The distance of the object from the mirror -
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, b)
m = ± 2 = 
= ± 2 = 
If m = + 2 = 
– 40 + 2x = – 20
2x = 20
x = 10 cm
if m = – 2 = 
40 – 2x = – 20
x = 30
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A student can distinctly see the object upto a distance 15 cm . He wants to see the black board at …
Two plane mirrors. A and B are aligned parallel to each other, as shown in the figure. A light ray …
A concave mirror of focal length is used to obtain the image of the sun which subtends an angle of…
A square of side is placed at a distance of from a concave mirror of focal length The centre of …
A thin rod of length lies along the axis of a concave mirror of focal length One end of its magni…
A ray of light falls on the surface of a spherical glass paper weight making an angle with the nor…