Photon Emission and Energy Levels

The video tutorial explains the energy changes in a Bohr model, focusing on electron transitions between energy levels. It covers the calculation of energy levels using Rydberg's equation, the emission of photons, and the determination of frequency and wavelength. The tutorial demonstrates how an electron transition from n=3 to n=2 results in the emission of a photon with specific energy, frequency, and wavelength, which corresponds to orange light in the visible spectrum.

What is the principal quantum number in the Bohr model?

• The number of protons in an atom

• The number of neutrons in an atom

• The energy level of an electron

• The number of electrons in an atom

What happens to an electron when it absorbs energy?

• It emits a photon

• It moves to a lower energy level

• It remains in the same energy level

• It moves to a higher energy level

What is emitted when an electron returns to a lower energy level?

• An electron

• A neutron

• A photon

• A proton

Which equation is used to calculate the energy change in electron transitions?

• Newton's Equation

• Rydberg's Equation

• Einstein's Equation

• Planck's Equation

What is the value of Rydberg's constant used in the calculations?

• 6.626 x 10^-34 J

• -6.626 x 10^-34 J

• -2.178 x 10^-18 J

• 2.178 x 10^-18 J

How is the frequency of a photon calculated?

• By multiplying energy by Planck's constant

• By dividing energy by Planck's constant

• By multiplying energy by the speed of light

• By dividing energy by the speed of light

What is the speed of light used in the wavelength calculation?

• 1.5 x 10^8 m/s

• 2.5 x 10^8 m/s

• 2.998 x 10^8 m/s

• 3.0 x 10^8 m/s

What is the wavelength of the photon emitted when an electron transitions from n=3 to n=2?

• 700 nm

• 500 nm

• 450 nm

• 657 nm

In which part of the electromagnetic spectrum does a 657 nm wavelength fall?

• Ultraviolet

• Infrared

• Visible

• Microwave

What color of light is emitted when an electron transitions from n=3 to n=2?

• Green

• Red

• Orange

• Blue