EM radiation

The only way to increase the number of electrons emitted from a metal is by increasing the _________ of the light

• Intensity

• Wavelength

• Frequency

• Energy

A particle of light is called a...

• Photoelectron

• Photon

• Proton

• Electron

What color of light has the greatest energy per photon?

• Red

• Green

• Blue

• Violet

The energy of photoelectrons emitted from a metal surface can be increased by

• using light of higher frequency.

• using light of longer wavelength.

• using light of higher intensity.

• using monochromatic, polarized light.

The photoelectric effect only occurs if the light shining on the metal is:

• coherent.
• above a minimum intensity.
• above a minimum frequency.
• above a minimum wavelength.

When light of specific frequencies is shined on a surface, electrons are ejected from the surface. This is the idea behind...

• Quantization of Energy

• Photoelectric Effect

• Conservation of Mass

• Conservation of Energy

The energy of a photon is directly proportional to its _____ and inversely proportional to its ______.

• intensity - speed

• wavelength - frequency

• frequency - wavelength

• intensity - wavelength

To release an electron the energy of the photon had to be more than

• zero

• the cut off frequency

• the work function

• the cut off wavelength

Which statement about the photoelectric effect is correct?

• Electrons are emitted instantaneously.

• Electrons are not emitted below a certain wavelength.

• You can change the energy of the electrons by changing the intensity.

• Electron energy is independent of frequency.

Which wave has the least energy?

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