Lightwaves

Which of the following helps to produce rainbows in the sky?

• A. diffraction 
• B. interference
• C. absorption
• D. refraction

What kinds of waves are used in radar for detecting the speed of a car?

• A. microwaves
• B. infrared waves        
• C. X rays           
• D. gamma rays         

Which of the following helps to produce rainbows in the sky?

• A. diffraction 
• B. refraction
• C. interference
• D. absorption

The color of a transparent object depends on the color of light that

• A. are transmitted.
• B. are refracted
• C. are diffracted.
• D. are reflected.

For the greatest amount of diffraction to occur when a wave reaches a barrier, the barrier must be

• A. larger than the wavelength.
• B. at least twice the size of the wavelength.       
• C. the same size or smaller than the wavelength.
• D. the exact same size as the wavelength.

The color of an opaque object is determined by the colors of light that

• A. are reflected.
• B. are diffracted.
• C. are transmitted.
• D. are refracted.

What are objects that produce visible light?

• A. illuminated
• B. refracted
• C. infrared
• D. luminous  

When white light is refracted, the amount that the light bends depends on which of the following?

• A. the light’s amplitude             
• B. the light’s wavelength              
• C. the light’s brightness
• D. the light’s frequency             

An electromagnetic wave is a wave that

• A. can travel only through matter.
• B. can travel only through empty space.    
• C. consists of changing electric and magnetic fields.
• D. is the same as sound waves and water waves.

Which of the following is a true statement about how the eye “sees” things?                          

• A. The light diffracts off an image and bounces away.   
• B. The light rays reflect off an object’s image and comes back to your eye.
• C. The light rays enter your pupil and vibrate through to your brain. 
• D. All of the above.