wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

In a medium of refractive index 1.6 and having a convex surface, a point object is placed at a distance of 12 cm from the pole. The radius of curvature is 6 cm. Locate the image as seen from air.

A
A real image at 30 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
A virtual image at 30 cm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
A real image at 4.28 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
A virtual image at 4.28 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B A virtual image at 30 cm

As per the sign convention (direction of incident ray taken as +ve)
Given that,
Radius of curvature, R=6 cm
Refractive index of the denser medium, μ1=1.6
Distance of object from pole, u=12 cm
At the spherical interface.

μ2vμ1u=μ2μ1R
1.0v1.612=11.66
or 1v=110215=3430=130
v=30 cm
Image formed will be virtual at a distance 30 cm on the same side as the object.
Why this question?
Caution: Be cautions about the side at which the centre of curvature of a spherical surface is lying, to determine the sign of radius of curvature of spherical surfaces.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon