A ray of light incident at an angle θ in a recta...
A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]
41.8°
48.2°
60.8°
90.0°
Correct answer is A
η=1sinθ
1.5=1sinθ
sinθ=11.5=0.667
\theta = sin^{-1}(0.667) = 41.835°
\approxeq 41.8°
A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is ...
It is easier to roll a barrel full of coal tar than to pull it because ...
A lead bullet of mass 0.05kg is fired with a velocity of 200ms^{-1} into a block of mass 0.95kg....
The graph above shows the expansion of water as the temperature increases from 0°C. Which of the...