Eye and Ear

Which of the following statements about short sight are correct?

• Image is formed behind the retina.

• It can be corrected by a convex lens.

• The eyeball is longer than normal.

• Images of far away objects are not clear.

The defect in the above diagram can be corrected by

• convex lens

• concave lens

A longer tuning fork can produce a sound of ________ frequency and _________ pitch than a shorter one.

• higher; higher

• lower; lower

• higher; lower

• lower; higher

Sounds are transmitted _______ in solids than in gases and cannot be transmitted in a ___________.

• faster; vacuum

• slower; vacuum

• faster; vaccum

• slower; vaccum

Frequencies are measured in ________ and sound levels are measured in ____________.

• hertz; decibels

• decibels; hertz

• hertz; decibles

• decibles; hertz

The three ear bones

• amplify vibrations

• pass vibrations to inner ear

• produce signals

• pass vibrations to eardrum