Light Waves and Ems Review

Light travels at the speed of light, and sound travels at the speed of sound. Both depend on the medium through which they travel. The difference is that in denser media, _______________ slows down but _______________ moves faster.

• light; sound

• sound; light

• Trick question! There is no difference. Neither speed changes, ever!

• Lies! They both slow down in denser media

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This wave has the second highest frequency on the spectrum. 

• microwaves
• visible light
• x-rays
• gamma ray

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Wavelengths on the right side of the Electromagnetic spectrum are ______________.

• short
• long
• average

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The higher the frequency the ______ the energy. 

• higher
• lower
• neither, stays the same

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What does this picture tells?

• white light consists of 7 colours

• white light is made up of all electromagnetic waves

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Which of the following waves in the electromagnetic spectrum has the highest energy?

• Radio Waves
• Ultraviolet Rays
• Gamma Rays
• Infrared Waves

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Which of the following electromagnetic waves has the longest wavelength?

• Infrared Waves
• Ultraviolet Rays
• Visible Light
• Gamma Rays

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As wavelength decreases in the electromagnetic spectrum the frequency _____. 

• decreases
• stays the same
• increases
• doubles

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Which color of light in the visible light spectrum has the most energy? 

• Red 
• Yellow 
• Violet
• Green

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Which type of electromagnetic waves is used to image bone? 

• Gamma Rays
• UV Rays
• X-Rays
• B-Rays

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