A pulse of light of duration 100 ps is absorbed completely by a small object initially at rest. Power of the pulse is 30 W and the speed of light is 3xx10^8 ms^(-1) . The final momentum of the object is :
During an experiment, a signal from spaceship reached the ground station in five minute. What was the distance of the speceship from the ground station ? The signal travels at the speed of light, that is, 3 xx 10^(8) ms ^(-1).
Frequency of sound wave is 600Hz. This wave Incidens perpendicular to open door of width 0.75m. At which angle is the first minima obtained ? (speed of light in air = 330 ms^(-1))
The speed of the light in a diamong is 1, 24,000 km/s. Find the refractive index of diamond if the speed of light in air is 3,00,000 km/s. (AS_(1))
The speed of light in water is less than the speed of light in air, confirms the assumption of which theory of light?
Explain how Corpuscular theory predicts the speed of light in a medium, say, water, to be greater than the speed of light in vacuum. Is the prediction confirmed by experimental determination of the speed of light in water? If not, which alternative picture of light is consistent with experiment?
The medium in which the speed of light is half of the speed in air, if light travels from such medium to air, then for what angle of incidence light will do total internal refelction ?
