A Man Is Nearsighted and Cannot See Things Clearly Beyond

question 37

Multiple Choice

A man is nearsighted and cannot see things clearly beyond 110from his eyes.What is the focal length of the contact lenses that will enable him to see very distant objects clearly?

• A) 50 cm
• B) -50 cm
• C) -110 cm
• D) 110 cm
• E) -30 cm

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Definitions:

Hammer, Anvil, Stirrup

The three small bones in the middle ear that play a key role in hearing by transmitting sound vibrations to the inner ear.

Middle Ear

The section of the ear located between the eardrum and the inner ear, responsible for amplifying sound waves.

Müller-Lyer Illusion

Illusion of line length that is distorted by inward-turning or outward-turning corners on the ends of the lines, causing lines of equal length to appear to be different.

Properties of Sound

Characteristics of sound waves, including frequency, amplitude, and timbre, that determine the pitch, loudness, and quality of sounds.