Focus on Light and Soundwaves

Which of the following will you hear as a high pitch? 

• sound wave with frequency of 10,000 Hz.
• sound wave with frequency of 50 Hz.
• sound wave with intensity of 10 dB.
• sound wave with intensity of 100 db.

In which of the following mediums will sound travel fastest? 

• brick 
• air
• liquid water
• oil

How does temperature of a medium affect the speed of sound waves? 

• Temperature does not affect the speed of sound waves.
• As the temperature of a substance increases, sound waves in it move faster.
• As the temperature of a substance increases, sound waves in it move more slowly.
• As the temperature of a substance decreases, sound waves in it move faster.

Why can you see most objects?

• light refracts through them.
• light reflects off them.
• they emit light.
• they absorb light.

Which of the following types of waves cannot travel through space? 

• ultraviolet
• radio
• light 
• sound

Which of the following has the shortest wavelength? 

• green light 
• X-rays 
• radio waves
• infrared waves

In which of the following materials will LIGHT travel fastest?

• vacuum
• air
• water
• glass

In which of the following materials will SOUND travel fastest? 

• vacuum 
• air
• water 
• glass

What causes light waves to refract? 

• The speed of light is reduced to zero.
• The speed of light remains constant. 
• The speed of light changes from one medium to the next. 
• The light is repelled (pushed) by some materials. 

This image shows oscilloscope reading of three sound waves. Which wave has the highest frequency? 

• wave A
• wave B
• wave C
• more information is needed.