Question

Condition of interference for dark band
due to reflected light from Thin film is
Answer
A
pon-1915)
B
C.
124
D.none of these​

Answer 1

Explanation:

Thin-film interference is a natural phenomenon in which light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light. ... The true thickness of the film depends on both its refractive index and on the angle of incidence of the light.

Answer 2

The correct question is :

Condition of interference for dark band due to reflected light from Thin film is :

A. 2μtcosr =(2n±1)λ/2

B. 2μtcosr=nλ

C. Both A and B

D. None of these

The correct option is C. Both A and B

• A thin film/ thin path interference helps rays be coherent and interact with each other in a better manner.
• During constructive interference or interactions where the rays are combing to create an effect together, the condition for interference is: 2μtcosr=nλ
• During destructive interference or interactions where the rays are opposing to create a reduced effect, the condition for interference is: 2μtcosr =(2n±1)λ/2