Ultraviolet Radiation Is Hard to Observe Primarily Because

question 15

Multiple Choice

Ultraviolet radiation is hard to observe primarily because:

• A) the Earth's atmosphere easily absorbs it
• B) no space-based telescopes operate at ultraviolet wavelengths
• C) only the lowest mass stars emit ultraviolet light
• D) very few objects emit at ultraviolet wavelengths
• E) the Earth emits too much ultraviolet background light

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Definitions:

Immunotherapy

A treatment that uses certain parts of a person’s immune system to fight diseases such as cancer.

Astrocytoma

A type of tumor that originates in astrocytes, star-shaped glial cells in the brain and spinal cord, varying widely in malignancy.

Neuroglial Cells

Cells in the nervous system that perform supportive and protective roles for neurons, rather than conducting nerve impulses.

Radiotherapy

A treatment method that uses high-energy radiation, commonly for cancer, to damage or destroy abnormal cells or shrink tumors without excessive damage to surrounding healthy tissue.