Published by:
CGP EDU Academic Team
Published on: September 12, 2026
In an experiment for estimating the value of focal length of converging mirror, image of an object placed at 40 cm from the pole of the mirror is formed at distance 120 cm from the pole of the mirror. These distances are measured with a modified scale in which there are 20 small divisions in 1 cm. The value of error in measurement of focal length of the mirror is 1/K cm. The value of K is______.
c
Text Solution
Verified by ExpertsThe correct answer is:
32
(32)
f = -30 cm
Now,
Also dv = du = 
cm
On solving
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
The difference of speed of light in the two media A and B (v A – v B ) is 2.6 x 10 7 m/s. If the re…
A light whose electric field vectors arc completely removed by using a good Polaroid, allowed to in…
Consider a light ray travelling in air is incident into a medium of refractive index . The inciden…
A ray of ligh is incident at an angle of incidence 60° on the glass slab of refractive index . Aft…
A light ray is incident, at an incident angle , on the system of two plane mirrors M 1 and M 2 hav…
A parallel beam of light is allowed to fall on a transparent spherical globe of diameter 30 cm and …