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What is refraction
What is melus law
The speed of light in a vacuum is 3.00 x 108 m/s. Calculate the speed of light in diamond (n=2.42).
An object placed 12 cm to the left of a converging lens forms an image on a screen 36 cm to the right of the lens. Calculate the focal length of the lens.
Light is travelling through air with an index of refraction of 1.00, at an angle of 30o, it then enters a mystery liquid and refracts at an angle of 14o This means that the index of refraction of the mystery liquid is:
Two mirrors are inclined at an angle of 45degrees and a point object is placed between the two mirrors.the number of images formed is

Number of line per centimeter of a plan diffraction grating is 6000.when a monochromatic light is incident on it the angle of diffraction for the second order spectral line become 450.find the wavelength of the light.


In Young's double slit experiment,a light of wavelength Is exposed to the slits which are separated by a distance d.analyze what change in the fringes will take place on the screen.will there any change be observed on the screen if one slit is closed?
How is the distance between interference fringes affected by the separation between the slits of Young experiment? Can visible light produce interference fringes? explain

Slight variations variations in the actual path causes a_________ according to Fermat?


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