37 DOL

• Planck's constant

• Speed of light

• Wavelength

• Frequency

When an electron in an atom absorbs energy, what process occurs?

• Electron excitation

• Electron emission

• Photon absorption

• Photon reflection

What happens when an excited electron returns to a lower energy level?

• It emits a photon of light

• It absorbs a photon

• It loses a proton

• It gains mass

Which of the following best describes the process of light emission in atoms?

• Electrons move to higher energy levels and emit light

• Electrons move to lower energy levels and emit light

• Protons move to higher energy levels and emit light

• Neutrons move to lower energy levels and emit light

What is the unit of frequency?

• Hertz (Hz)

• Joule (J)

• Meter (m)

• Newton (N)

What is the unit of wavelength?

• Meter (m)

• Second (s)

• Joule (J)

• Watt (W)

What is the unit of photon energy?

• Joule (J)

• Meter (m)

• Hertz (Hz)

• Second (s)

If the frequency of a photon increases, what happens to its energy?

• Increases

• Decreases

• Stays the same

• Becomes zero