Dual Nature Of Matter

Out of a photon and an electron, the equation , is valid for

The ionisation potential of hydrogen atom is 13.6 eV. How much energy need to be supplied to ionise the hydrogen atom in the first excited state?

How does the energy difference between the consecutive energy level vary as the quantum number n increases?

In an L-C-R series circuit, the values of R, and are 120 Ω, 180 Ω and 130 Ω. What is the impedance of the circuit?

Fifty six tuning forks are arranged in a series such that each fork gives 6 beats per second with the preceding one. Assuming the frequency of the last fork to be double of the first fork, the frequency of the last fork should be

A copper ball of radius r is moving with a uniform velocity v in the mustard oil and the dragging force acting on the ball is F. The dragging force on the copper ball of radius 2r with uniform velocity 2v in the mustard oil is

A photon and an electron have equal energy . is proportional to

The stopping potential for photoelectric emission from a metal surface is plotted along Y-axis and frequency v of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by}

Photons of energy fall on the surface of the metal emitting photoelectrons of maximum kinetic energy . The stopping voltage required for these electrons is