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

The sun subtends an angle of (1/2)th on earth. The image of sun is obtained on the screen with the help of a convex lens of focal length 100 cm the diameter of the image obtained on the screen will be.

A
18 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
1 mm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
50 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
8.73 mm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is C 8.73 mm
The sun subtends at an angle (1/2)0,
The focal length of the convex lens, f=100cm
from the above figure,
θ in rad=arcradius=xf
as we know that, π=1800
So, π180×12=x100cm

x=0.872cm=8.72mm
The diameter of the image obtained on the screen is 8.72mm
The correct option is D.


1425687_1055336_ans_2a0926bc90b9460988e48950f8ead9a6.jpeg

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Thin Lenses: Point Objects
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon