A light of wavelength 5890Å falls normal...

A light of wavelength `5890Å` falls normally on a thin air film. The minimum thickness of the film such that the film appears dark in reflected light is

`2.945 xx10^(-7)m`

`3.945 xx10^(-7)m`

`4.95 xx10 ^(-7)m`

`1.945 xx 10^(-7) m`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

WAVE OPTICS
ERRORLESS |Exercise wave Nature and Interference of Light|1 Videos
WAVE OPTICS
ERRORLESS |Exercise Doppler s Effect of Light|1 Videos
RAY OPTICS
ERRORLESS |Exercise SET|25 Videos

Similar Questions

Explore conceptually related problems

Why does an excessively thin film appear black in reflected light ?

A parallel beam of light of wavelength 560 nm falls on a thin film of oil (refractive index = 1.4). What should be the minimum thickness of the film so that it strongly S4 T z reflects the light ?

A parallel beam of light of wavelenght 560 nm falls on a film of oil (refractive index =1.4 ). What should be the minimum thickness of the film so that it weakly transmits the light ?

Refractive index of a thin soap film of a uniform thickness is 1.38. The smallest thickness of the film that gives an interference maxima in the reflected light when light of wavelength 5520 Å falls at normal incidence is

A thin film of a specific meterial can be used to decrease the intensity of reflected light. There is destrucive inteference of wave reflected from upper and lower surface of the film. These films are called non-reflecting or anti-reflecting coatings. The process of coating the lens or surface with non-reflecting film is called blooming as shown in figure The refracting index of coating (n_(1)) is less than that of the glass (n_(2)) . 4. If a light of wavelength lambda is incident normally and the thickness of film is t, then optical path difference between waves reflected from upper and lower surface of the film is

Refractive index of a thin soap film of a uniform thickness is 1.34. Find the smallest thickness of the film that gives in interference maximum in the reflected light when light of wavelength 5360 Å fall at normal incidence.

ERRORLESS -WAVE OPTICS-SET

A light of wavelength 5890Å falls normally on a thin air film. The min...
Text Solution
|
Following figures shows sources S1 and S2 that emits light of waveleng...
Text Solution
|
In a Young's double slit experimental arrangement shown here, if a mic...
Text Solution
|
In the set up shown in figure, the two slits S1 and S2 are not equidis...
Text Solution
|
The intensity ratio of two coherent sources of light is p. They are i...
Text Solution
|
Three waves of equal frequency having amplitudes 10mum, 4mum, 7mum arr...
Text Solution
|
Four different independent waves are represented by (i) y(1) = a(1) ...
Text Solution
|
A beam of light consisting of two wavelength 650nm and 520nm is used t...
Text Solution
|
Two identical radiators have a separation of d=lambda//4 where lambda ...
Text Solution
|
In Young’s double slit experiment, the 8 th maximum with wavelength la...
Text Solution
|
Light of wavelength 500nm is used to form interference pattern in Youn...
Text Solution
|
Two coherent sources of equal intensity produce maximum intensity of 1...
Text Solution
|
The path difference between two interfering waves of equal intensities...
Text Solution
|
In a Young's double slit experiment, I0 is the intensity at the centra...
Text Solution
|
In a Fresnel’s diffraction arrangement, the screen is at a distance of...
Text Solution
|
If n represents the order of a half period zone, the area of this zone...
Text Solution
|
A screen is placed 50 cm from a single slit, which is illuminated with...
Text Solution
|
In Young's double slit experiment, the fringes are displaced index 1.5...
Text Solution
|
Two waves of equal amplitude and frequency interfere each other. The r...
Text Solution
|
In Young's double-slit experiment , we get 60 fringes in the field of ...
Text Solution
|
A parallel- plate capacitor with plate area A and separation between t...
Text Solution
|