A convex lens is put 
from a light source and it makes a sharp image on a screen, kept 
from the lens. Now a glass block (refractive index 
) of 
thickness is placed in contact with the light source. To get the sharp image again, the screem is shifted by a distance 
. Then 
is:
A
away from the lens
B
C
towards the lens
D
away from the lens
Text Solution
Verified by ExpertsThe correct answer is:
D
JEE Main 2019
Using lens formula
Shift due to slab, 
in the direction of incident ray
or, 
Now, 
Again using lens formulas 
or, 
Thus, screen is shifted by a distance
away from the lens.
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
Rays converging at a point behind a convex mirror are incident on the mirror. Image formed will be –
Parallel rays of light are falling on convex spherical surface of radius of curvature R = 20 cm as …
A plano convex lens of refractive index and focal length is kept in contact with another plano co…
The eye can be regarded as a single refracting surface. The radius of curvature of this surface is …
the following graphs is the correct one, if is the angle of minimum deviation?
An object is at a distance of from a convex lens of focal length . The lens forms an image of the…