12) In a soap film with a refractive index of 1.333, a 620 nm light undergoes constructive interference. Estimate the thickness of the film.
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Given
The refractive index of the film is
the wavelength of the light is
Since the interference is constructive then
where t is the thickness of the film, then
Hence the thickness of the film is 116.54 nm
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- For problem 35 calculate the thickness of the acetone in micrometers if the wavelength of the source is changed to 624.0 nm!! (5 sig figs)The question is :show how you applied the equation for light diffraction by a grating. Thank you:)a) A laser beam falls on a double slit that has a separation of 0.200 mm. An interference pattern is observed on the screen that is placed about 5.00 m from the slit. An angle of 0.181o is measured from the central strip to the first order. Determine the wavelength of the laser b) Find the angle (in radians) of the fringe m=2 that is formed if two apertures 0.35 mm apart are illuminated by yellow light with a wavelength of 550 nm.
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