Q4L4 SCIENCE 11 - LIGHT AND SOUNDS

You are looking through a window. You can see there is someone on the other side of the window but you cannot clearly recognize who they are. Which term would best describe the window?

• Transparent

• Translucent

• Opaque

Which of the following correctly describes the law of reflection?

• The angle of reflection is greater than the angle of incidence

• The angle of incidence and the angle of reflection are the same

• The angle of reflection is less than the angle of incidence

• The angle of reflection is the same as the normal angle

What is the frequency of audible sounds?

• 2 Hz to 20 Hz

• 20 Hz to 200 Hz

• 20 Hz to 200 KHz

• 20 Hz to 20 KHz

What happens to the loudness of the sound when its amplitude is higher?

• No difference

• Low

• High

• High or low.

1)      A sound wave is an example of a(n) ____ wave.

• transverse

• longitudinal

• crest-and-trough

• electromagnetic

The highest frequency a human can hear is (a)   Hz

According to the law of reflection, the angle of incidence _____ the angle of reflection

• less than

• equal to

• greater than

• always twice

When the doppler effect becomes extreme and sound waves begin to overlap one another a __ can develop.

• sonar

• shock wave

• beat

• explosion

What is a Crest?

• Lowest Point of a Wave.

• Middle Point of a Wave.

• Highest Point of a Wave.

• Found on the floor.

What is a trough?

• Highest Point of a wave.

• Lowest Point of a wave.

• Middle Point of a wave.

• Found in the sky.