Absorption and Emission Spectra - OR

Front

What is an absorption spectrum?

Back

An absorption spectrum is a spectrum of absorbed light, showing dark lines or bands where specific wavelengths of light have been absorbed by a substance.

Front

What is an emission spectrum?

Back

An emission spectrum is a spectrum of light emitted by a substance, showing bright lines or bands at specific wavelengths corresponding to the energy levels of the atoms.

Front

What class of star has the lowest temperature?

Back

M class stars have the lowest temperatures among the classes of stars.

Front

What class of star has the highest temperature?

Back

O class stars have the highest temperatures among the classes of stars.

Front

What does a redshift in absorption lines indicate?

Back

A redshift in absorption lines indicates that the object is moving away from the observer.

Front

What does a blueshift in absorption lines indicate?

Back

A blueshift in absorption lines indicates that the object is moving towards the observer.

Front

How can scientists identify gases in a mixture?

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Scientists can identify gases in a mixture by analyzing the emission spectrum produced when the mixture is heated.

Front

What is the significance of the continuous spectrum of light?

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A continuous spectrum of light indicates that the light source emits all wavelengths of visible light without interruption.

Front

What role does a cloud of dust and gas play in observing light from stars?

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A cloud of dust and gas can absorb certain wavelengths of light, creating an absorption spectrum that can be analyzed to determine the elements present.

Front

What elements are typically found in interstellar clouds?

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Interstellar clouds often contain hydrogen and helium, among other elements.