A Magnifying Glass Has a Convex Lens of Focal Length

question 32

Short Answer

A magnifying glass has a convex lens of focal length 15 cm. At what distance from a postage stamp should you hold this lens to get a magnification of +2.0?

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Definitions:

Melatonin

A hormone produced by the pineal gland in the brain, involved in regulating the sleep-wake cycle.

Non-rapid Eye Movement Sleep

A type of sleep that includes stages 1-3, characterized by a gradual decrease in heart rate, breathing rate, and muscle activity.

Startles Easily

A heightened response to sudden, unexpected stimuli, indicating increased sensitivity or anxiety.

Awaken

To rouse from sleep or to become alert and conscious after being asleep or less alert.