Sound and Light

How are electromagnetic waves different from other waves? 

• They have very short wavelengths 
• They transmit energy instead of matter 
• They can travel through a vacuum 
• They can change direction by reflection 

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Which color has the highest frequency?

• red
• orange
• green
• blue

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EM waves are always____________

• Transverse
• Compression
• Longitudinal
• Seismic

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You and your father inspect an empty house with the hopes of buying it. You walk through the rooms talking to one another, and you notice that your voices and footsteps are echoing in the big, empty house. What causes the echo?

• sound waves reflecting off smooth, flat surfaces throughout the house
• sound waves moving around the large rooms
• sound waves moving slowly through air
• sound waves refracting around corners in the empty rooms

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As the fire truck approached Mary, the pitch of the siren got higher. Once the fire truck passed and moved away, the siren's pitch got lower. This change in pitch is because of a change in the sound wave's

• concussion. 
• amplitude. 
• reflection.
• frequency. 

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As the fire truck approached Mary, the pitch of the siren got higher. Once the fire truck passed and moved away, the siren's pitch got lower. This is an example of the:

• Refraction Effect

• Reflection Effect

• Cause Effect

• Doppler Effect

The electromagnetic spectrum is divided into regions by

• colors.
• the way they are used. 
• wavelength. 
• speed. 

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In order for a fish to see a bug just above the surface of the water, light travels from the insect through the air and crosses into the water until it reaches the fishes' eye. Which statement is true regarding the light wave as it travels? 

• It will bend as it hits the water because it slows down.
• It will bend as it hits the water because the water particles move slower than air. 
• It will travel straight from the bug to the fishes' eye because that is the most direct path. 
• It will travel straight from the bug to the fishes' eye because it will continue to travel at the speed of light. 

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The higher the frequency the ______ the energy. 

• higher
• lower
• neither, stays the same

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Why does a ruler with one end in the air and one end under water appear bent?

• Light moves through air faster than it moves through water.
• The light is reflected from the ruler moves in a curved path.
• Light moves through water at the same speed as it moves through air.
• Light in the air is brighter than light in the water.

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