Gravitational Lensing

question 3

Multiple Choice

Gravitational lensing

• A)occurs when light passes near a massive object and is deflected by the object's gravitational field.
• B)can be used to determine the luminosity of a galaxy.
• C)occurs when the mass of a galaxy is greater than expected from the luminosity of the galaxy.
• D)occurs when the mass of a galaxy is less than expected from the luminosity of the galaxy.
• E)can be used to determine the recessional velocity of a galaxy.

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Definitions:

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without prior conditioning in classical conditioning paradigms.

Conditioned Response

A learned response to a previously neutral stimulus that has been repeatedly presented along with an unconditioned stimulus.

Air Puff

A research technique or clinical tool where a sudden burst of air is applied to a part of the body or sensory organ to test reactions or reflexes.

Extinction

The weakening of a learned response that is produced if a conditioned stimulus is now repeatedly presented without the unconditioned stimulus.