White light, with a uniform intensity across the visible wavelength range 430 - 690 nm, is perpendicularly incident on a wate film, of index of refraction `mu = 1.33` and thickness `d = 320`nm, that is suspended in air. At what wavelength `lambda` is the light reflected by the film brightest to an observer?

Light of wavelength 6000 Å is reflected at nearly normal incidence from a soap films of refractive index 1.4 The least thickness of the fringe then will appear black is

White light is incident normally on a thin glass plate of refractive index 1.5. Calculate the minimum thickness of the film for which the wavelength 4200 Å is absent for the reflected light.

When white light is incident normally an oil film of thickness 10^-4 cm and refractive index. 1.4 then the wavelength which will not be seen in the reflected system of light is

White light falls normally on a film of soap water whose thickness is 5xx10^(-5)cm and refractive index is 1.40. The wavelengths in the visible region that are reflected the most strongly are :

A thin film of refractive index 1.5 and thickness 4 xx 10^(-5) cm is illuminated by light normal to the surface. What wavelength within the visible spectrum will be intensified in the reflected beam?

A plastic film with index of refraction 1.80 is put on the surface of a car window to increase the reflectivity and thereby to keep the interior of the car cooler. The widow glass gas index of refraction 1.60. What minimum thickness is required, if light of wavelength 600 nm in air reflected from the two sides of the film is to interfere constructively? (b) It is found to be difficult to manufacture and install coatings as thin as calculated in part (a). What is the next greatest thickness for which there will also be constructive interference?

White light is incident on water film of thickness 1 mu m . Refractive index of water is 1.33. Which wavelengths in visible region (400 nm to 700 nm) will be strongly reflected by the water film ? Assume air on both sides of the film.

White light is incident on water film of thickness 1 mu m . Refractive index of water is 1.33. Which wavelengths in visible region (400 nm to 700 nm) will be strongly reflected by the water film ? Assume air on both sides of the film.