Quantum Mechanics: Energy and Photons

The video explores the concept of exciting electrons, focusing on how electrons move between energy levels in a hydrogen atom. It explains the role of photons in exciting electrons and the quantum mechanics principles governing these transitions. The video also demonstrates how to calculate the energy of a photon using Planck's constant and the speed of light, emphasizing the quantized nature of energy levels.

What is the simplest atom used to explain the concept of exciting electrons?

• Hydrogen

• Helium

• Oxygen

• Carbon

What happens to an electron when it absorbs a photon with sufficient energy?

• It gets excited to a higher energy level

• It moves to a lower energy level

• It remains in the same energy level

• It disappears

What is the wavelength of the photon used to excite the electron from the second to the fourth shell?

• 450 nanometers

• 400 nanometers

• 486 nanometers

• 500 nanometers

In quantum mechanics, what is required for a photon to excite an electron to a higher energy level?

• Any amount of energy

• A specific amount of energy

• No energy

• Negative energy

What is the term used to describe the discrete nature of energy levels in quantum mechanics?

• Variable states

• Continuous states

• Quantum states

• Random states

What formula is used to calculate the energy of a photon?

• E = 1/2 mv^2

• E = h * frequency

• E = mc^2

• E = mgh

What constant is used in the formula to calculate the energy of a photon?

• Gravitational constant

• Boltzmann constant

• Planck's constant

• Avogadro's number

How is the frequency of light related to its wavelength?

• Frequency is unrelated to wavelength

• Frequency is equal to wavelength

• Frequency is inversely proportional to wavelength

• Frequency is directly proportional to wavelength

What is the energy of a photon with a wavelength of 486 nanometers?

• 5.00 x 10^-19 joules

• 3.00 x 10^-19 joules

• 6.00 x 10^-19 joules

• 4.09 x 10^-19 joules

What is the speed of light used in the calculation of photon energy?

• 2.98 x 10^8 m/s

• 3.00 x 10^8 m/s

• 2.99 x 10^8 m/s

• 3.10 x 10^8 m/s