Particle Nature of Light & Atomic Emission Spectrum

Light acts like

• a wave.

• a particle.

• Both a wave and a particle

• neither a wave nor a particle.

Electormagnetic radiation travels through a vacuum at a speed of 

• 186,000 m/s.
• 125 m/s
• 3.00 x 10⁸ m/s
• It depends on the wavelength

What is Planck's Constant?

• 6.626x10^-34 Js

• 6.626x10^-39 J/s

• 3.0x10⁸ ms

• 3.0x10⁸ m/s

'Quantum' is define as...

• Packets of energy

• the maximum amount of energy that can be gained or lost by an atom

• the minimum amount of energy that can be gained or lost by an atom

• The space time continuum

The distance between two corresponding parts of a wave is its

• amplitude

• frequency

• wavelength

• velocity

Which particle is a wave of light?

• proton

• neutron

• electron

• photon

This image is an illustration of

• photoelectric effect

• diffraction effect

• particle interference effect

• wave interference effect

Using the information about Potassium (K), how many neutrons are in this atom?

• 19

• 20

• 30

• 39

All stars are composed of a mixture of elements. When these elements are heated they emit specific amounts of electromagnetic radiation, known as an emission spectrum. Each element emits a unique, identifiable, spectrum.

Using the Bright-line emission spectrum chart below, identify the elements present in this modeled star (found in the line labeled “mixture”).

• Lithium and cadmium are in the mixture. Strontium is not in the mixture.

• Lithium and strontium are in the mixture. Cadmium is not in the mixture

• Cadmium and strontium are in the mixture. Lithium is not in the mixture

• All of the shown elements are present in the mixture.

The _______________ determines the color of visible light. 

• wavelength
• speed
• amplitude
• light