(D) Option $A$ is correct because the reflection of electromagnetic waves from a moving aeroplane causes interference,leading to ghost images.Option $

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(D) Option $A$ is correct because the reflection of electromagnetic waves from a moving aeroplane causes interference,leading to ghost images.Option $B$ is correct because thin-film interference is used to reduce reflection in solar cells,increasing light absorption.Option $C$ is correct because non-reflective coatings (like $MgF_2$) use destructive interference to eliminate unwanted reflections in optical lenses.Since all statements are scientifically accurate,the correct choice is $D$.

Class 12 Physics Wave Optics Thin film Interference, fresnel biprism, lloyd's mirror

Medium

Choose the correct statement.

A
While watching television by means of an antenna,a passing nearby aeroplane can produce wavering ghost images in the television picture.
B
Solar cells are often coated with a transparent thin film,such as silicon monoxide $(SiO)$,to minimize reflective losses.
C
Glass lenses used in cameras and other optical instruments are usually coated with a transparent thin film,such as magnesium fluoride $(MgF_2)$,to reduce or eliminate unwanted reflection.
D
All of these.

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Class 12 Questions

Class 12

Physics Questions

Chapter

Wave Optics

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Thin film Interference, fresnel biprism, lloyd's mirror

$A$ light of wavelength $5890 \; \mathring{A}$ falls normally on a thin air film. What is the minimum thickness of the film such that the film appears dark in reflected light?

Difficult

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$A$ Fresnel's biprism experiment is performed in water. If the fringe width in air is $\beta_a$,and the refractive indices of the biprism material and water are $1.5$ and $1.33$ respectively,find the new fringe width.

Difficult

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$A$ soap film with refractive index $\mu = 4/3$ is illuminated by white light incident at an angle of $60^\circ$. $A$ dark band corresponding to a wavelength of $5500 \, \mathring{A}$ is observed in the reflected light. Find the minimum thickness of the film in $\mathring{A}$.

Medium

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In a Fresnel biprism experiment,the two positions of the lens give separations between the virtual slits as $16 \; cm$ and $9 \; cm$ respectively. What is the actual distance of separation (in $cm$)?

MediumAIPMT 1996

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In a biprism experiment,the distance of the second dark fringe from the central fringe is $3 \ mm$. The distance of the sixth bright fringe from the central fringe is (in $mm$)

EasyMHT CET 2025

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Choose the correct statement.

Similar Questions

$A$ light of wavelength $5890 \; \mathring{A}$ falls normally on a thin air film. What is the minimum thickness of the film such that the film appears dark in reflected light?

$A$ Fresnel's biprism experiment is performed in water. If the fringe width in air is $\beta_a$,and the refractive indices of the biprism material and water are $1.5$ and $1.33$ respectively,find the new fringe width.

$A$ soap film with refractive index $\mu = 4/3$ is illuminated by white light incident at an angle of $60^\circ$. $A$ dark band corresponding to a wavelength of $5500 \, \mathring{A}$ is observed in the reflected light. Find the minimum thickness of the film in $\mathring{A}$.

In a Fresnel biprism experiment,the two positions of the lens give separations between the virtual slits as $16 \; cm$ and $9 \; cm$ respectively. What is the actual distance of separation (in $cm$)?

In a biprism experiment,the distance of the second dark fringe from the central fringe is $3 \ mm$. The distance of the sixth bright fringe from the central fringe is (in $mm$)

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