Unit 5 Light & Spectrum Practice

Which of the following statements correctly describes the speed of light?

• Radio waves travel the slowest and gamma rays travel the fastest through any given medium

• Gamma Rays travel slowest and radio waves travel the fastest through any given medium

• All forms of light travel at the same speed through any given medium

• The speed of light changes depending on the distance from the source

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We send telescopes, like the Hubble and James Webb Space telescopes, into space to stop interference from​ Earth's​ (a)   in detecting electromagnetic radiation.

• atmosphere
• oceans
• magnetic field
• gravity

The distance between one point on a wave to the same point on the corresponding wave is called a wave's _____________?

• Frequency

• Wavelength

• Amplitude

• Spectrum

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The number or amount of waves passing through a point every second is called a waves ___________?

• Frequency

• Wavelength

• Amplitude

• Spectrum

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The range of all types of light is called the Electromagnetic _______________?

• Frequency

• Wave

• Field

• Spectrum

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Match the type of light to its correct description.

• Radio Waves

• This type of light we feel as heat

• Ultraviolet (UV) Light

• This type of light we can see with our eyes

• Infrared Light

• This is type of light allows us to communicate with other people over long distances

• Visible Light

• This type of light carries the most energy of any photons and can come from lightning or thermonuclear reactions

• Gamma Rays

• This type of light can cause a sunburn

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Select the color of light that has the lowest frequency and energy level. (Red is on the left, violet is on the right)

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Categorize the statements as correctly describing the Hubble or James Webb Space telescopes. (Hint: 4 statements per category)

Groups:

(a) Hubble Space Telescope

,

(b) James Webb Space Telescope

• Has a larger mirror and can generate clearer images

• Orbits the Sun 1.5 million miles away from the Earth

• Orbits the Earth

• Has a smaller mirror which is uses to collect light

• Launched in December 2021

• Observes primarily visible and ultraviolet light

• Observes primarily infrared light

• Launched in 1990

Why are line emission spectra of elements called "atomic fingerprints"?

• They are all the same
• They are all unique
• They are all similar
• They all contain colored light

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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.

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