Suppose You Look at a Spectrum of Visible Light by Looking

question 148

Multiple Choice

Suppose you look at a spectrum of visible light by looking through a prism or diffraction grating. How can you decide whether it is an emission line spectrum or an absorption line spectrum?

• A)An emission line spectrum consists of bright lines on a dark background, while an absorption line spectrum consists of dark lines on a rainbow background.
• B)The only way to decide is to make a graph of the intensity of the light at every wavelength, and then analyze the graph carefully.
• C)An emission line spectrum consists of a long bright line, while an absorption line spectrum consists of a long dark line.
• D)The emission line spectrum is produced by electrons jumping up in energy level, while the absorption line spectrum is produced by electrons jumping down in energy level.

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Definitions:

Superior Mesenteric Artery

A major artery of the abdomen that supplies blood to a large portion of the small intestine and part of the large intestine.

Femoral Artery

A large artery in the thigh that supplies blood to the lower limb.

Popliteal Artery

The continuation of the femoral artery behind the knee, it supplies blood to the knee joint and surrounding muscles.

Anterior Tibial Artery

A major blood vessel in the lower leg that supplies blood to the anterior compartment of the leg and dorsum of the foot.