A narrow beam of monochromatic light in air is incident on a plane boundary between air and glass such that the angle between the beam and the normal is 60°. If the refractive index of the
glass is 1.5, through what angle will the beam of light be bent or deviated on refraction?

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Aphysical change is a change in the size, shape,, or stafe of matter true or false

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples