Development of Quantum Mechanics: Photoelectric Effect Example 1

The video tutorial explains the photoelectric effect through a practice problem. It covers calculating the maximum kinetic energy and velocity of an electron when light hits a metal surface. The tutorial also demonstrates how to find the threshold frequency required to eject an electron, using Planck's constant and the work function. Key calculations involve converting units and applying formulas related to energy and frequency.

What is the wavelength of light used in the photoelectric effect problem?

• 500 nanometers

• 800 nanometers

• 600 nanometers

• 700 nanometers

How is the frequency of light calculated from its wavelength?

• By multiplying the speed of light with the wavelength

• By adding the speed of light to the wavelength

• By dividing the speed of light by the wavelength

• By subtracting the speed of light from the wavelength

What is the work function of the metal surface in joules?

• 1.6 x 10^-19 joules

• 4.0 x 10^-19 joules

• 2.56 x 10^-19 joules

• 3.2 x 10^-19 joules

Which constant is used to calculate the kinetic energy of the ejected electron?

• Boltzmann's constant

• Avogadro's constant

• Planck's constant

• Gravitational constant

What is the maximum kinetic energy of the ejected electron?

• 9.53 x 10^-20 joules

• 6.53 x 10^-20 joules

• 7.53 x 10^-20 joules

• 8.53 x 10^-20 joules

What is the mass of an electron used in the velocity calculation?

• 11.11 x 10^-31 kg

• 8.11 x 10^-31 kg

• 9.11 x 10^-31 kg

• 10.11 x 10^-31 kg

What is the threshold frequency required to eject an electron from the metal?

• 5.86 x 10^14 Hz

• 4.86 x 10^14 Hz

• 3.86 x 10^14 Hz

• 2.86 x 10^14 Hz