Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Find the minimum thickness of a film which will strongly reflect the light of wavelength 589 nm . The refractive index of the material of the film is 1.25 .
Text Solution
Verified by ExpertsThe correct answer is:
A
For strong reflection, the least optical path difference introduced by the film should be 
. The optical path difference between the waves reflected from the surfaces of the film is 
. Thus for strong reflection 
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
PHYSICS
SINGLE CORRECT MCQ
One face of equiconvex lens is silvered. After silvering lens will behav…
A point charge is placed near a conducting neutral sphere of radius . Then electric potential due…
Choose the incorrect statement:
A river is flowing from west to east at a speed of minute. A man on the south bank of river, capab…
A particle is projected from surface of Earth with velocity v , such that it's total energy at heig…
Light emitted from a star (assumed to be a black body) has a maximum intensity at wavelength . If …