A Black Hole Is So Named Because

question 142

Multiple Choice

A black hole is so named because:

• A) the gravitational field is so high that the wavelength of its emitted light is gravitationally redshifted to radio wavelengths.
• B) it emits no visible light because it is so cold, less than 100 K.
• C) no light can escape from it due to its powerful gravitational field.
• D) it is colder that the rest of the universe; that is, its effective temperature is less than 3 K.

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Definitions:

Independent Variable

A variable that is manipulated or controlled in an experiment to test its effects on the dependent variable.

Violent Films

Movies that contain scenes of physical aggression, which can have varying effects on different audiences.

Aggressive Behavior

Actions intended to harm or cause discomfort to another person.

Control Group

In experimental research, the group of subjects that does not receive the experimental treatment, serving as a baseline for comparison.