In a thin film between two points A and B, eight fringes are observed with light of wavelength 5461 Å. How many fringes will be observed between the same two points A and B if the wavelength of the light used is 6500 Å.
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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
Correct Answer - `100 mm`
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In YDSE pattern with light of wavelength `lambda_1 = 500nm`, 15 fringes are obtained on a certain segment of screen. If number of fringes for light of
Correct Answer - 750 nm
2 Answers 1 views
A parallel beam of white light falls from air on a thin film whose refractive index is `sqrt ( 3)` . The medium on both sides of the film is air. The
Correct Answer - 100nm
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A thin film having refractive index` mu" = 1.5"` has air on both sides. It is illuminated by white light falling normally on it. Analysis of the refle
Correct Answer - (a)900 nm (b)415nm ,491nm,600nm,771nm
2 Answers 1 views
Given that a photon of light of wavelength 10,000Å has an energy equal to 1.23eV. When light of wavelength 5000Å and intensity `I_(0)` falls on a phot
Correct Answer - (i) 1.1 eV (ii) `1.6 xx 10^(-6) A` ; unchanged
2 Answers 1 views
When two narrow slits separated by a small distance are illuminated by a light of wavelength ` 5 xx 10^(-7)` m , interference fringes of width `0.5` m
Correct Answer - `6 xx 10^(-7)`m
2 Answers 1 views
A thin film of thickness `4xx10^(-5)` cm and `mu`=1.5 is iluminated by white light incident normal to its surface. What wavelength in the visible rang
Correct Answer - 4800 Å
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With a thin air film between two points, 6 fringes appear when light of wavelength 5890 Å is used. Calculate the difference in the thickness of the fi
Correct Answer - 1.767 micron
2 Answers 2 views
White light is incident normally on a plane parallel thin film of µ=1.5. Find the minimum thickness of the film for which light of `lamda`=4000 Å is a
Correct Answer - `1.33xx10^(-7)`m
2 Answers 2 views
Two fine slits are placed very close to each other and they are illuminated by a strong beam of light of wavelength `5900Å`. Fringes are obtained at a
Correct Answer - `[3xx10^(-3)m]`
2 Answers 1 views