Wave Optics — Physics STD 12 Science — Question

An electron in an atom is revolving round the nucleus in a circular orbit of radius \(5.3 \times 10^{-11} m\) with a speed of\(3 \times 10^6 m / s\). Find the angular momentum of electron.

What would happen if two streamlines intersect?

What is a radius vector in circular motion?

The photoelectric work function for a metal is \(5 eV\). Calculate the threshold frequency for the metal.

A car rounds a curve of radius \(625 m\) with a speed of \(45 m / s\). What is the minimum value of coefficient of friction which prevents the car from sliding?

Compare Young’s Double Slit Interference Pattern and Single Slit Diffraction Pattern.

What is polar dielectrics?

Calculate the work done in blowing a soap bubble of radius \(0.1 m\). (Surface tension of soap solution \(=30\) dyne \(/ cm\) )

A flat curve on a highway has a radius of curvature \(400 m\). A car goes around a curve at a speed of \(32 m / s\). What is the minimum value of coefficient of friction that will prevent the car from sliding? \(\left(g=9.8 m / s ^2\right)\)

What causes viscous drag in fluids?