Quantum Physics

Front

What color of visible light has the lowest frequency?

Back

Red has the lowest frequency among visible light colors.

Front

What is the quantum energy of a monochromatic light beam that can release electrons in a photocell with a work function of 4.1 eV?

Back

The maximum kinetic energy of the electron is 4.9 eV when the quantum energy is 9.0 eV.

Front

What is the SI unit of frequency?

Back

Hertz (Hz) is the SI unit of frequency.

Front

What is the minimum frequency for which the photoelectric effect can occur?

Back

The minimum frequency is called the threshold frequency.

Front

What happens when the intensity of light striking a metal surface is increased without changing its wavelength?

Back

More electrons are emitted in a given time interval.

Front

Define quantum physics.

Back

Quantum physics is the branch of physics that deals with the behavior of matter and energy at the atomic and subatomic levels.

Front

What is the photoelectric effect?

Back

The photoelectric effect is the emission of electrons from a material when it absorbs light or electromagnetic radiation.

Front

What is the work function in the context of the photoelectric effect?

Back

The work function is the minimum energy required to remove an electron from the surface of a material.

Front

How is frequency related to wavelength in electromagnetic waves?

Back

Frequency is inversely proportional to wavelength; as frequency increases, wavelength decreases.

Front

What is the formula for calculating the energy of a photon?

Back

Energy (E) = h * f, where h is Planck's constant and f is frequency.