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At what position of the pendulum is the potential energy maximum?what is the kinetic energy at this point?

Internal critical angle in core at core cladding interface of a step index fiber 78.6. The refractive index of cladding is 1.45 what is refractive index of core

Light travels from air into an optical fiber with an index of refraction of 1.44. 

(a) In which direction does the light bend? (b) If the angle of incidence on the

end of the fiber is 22 o , what is the angle of refraction inside the fiber? (c) 

Sketch the path of light as it changes media.

Light is incident on a diffraction grating that has 300 lines /mm. A diffraction pattern is observed. The angle between the central maximum and second order maximum was measured to be 250 . Calculate the wavelength of the light.

a silica optical fiber with a core diameter large enough to be considered by ray theory analysis has a core refractive index of 1.50 and a cladding refractive index of 1.47.determine the critical angle at the core-cladding interface.

A concave mirror is positioned at a distance 5cm from an object. Give a linear magnification of F.If the image is upright calculate the radius curvature of the mirror

The critical angle for light traveling from a transparent medium to air is measured as 3F. The refractive index of the medium is

An object placed 12cm in front of a convex lens produced a virtual image of magnification 3.0. Calculate the focal length of the lens

The life time of an atom on a metastable state is the order of 

If the density of water is 1,00 g/cm3 and atmospheric pressure is 1,013 × 105 Pa, the depth in water (in m) where the absolute pressure is four times atmospheric pressure, is equal to

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