Calculations Electromagnetic Spectrum

EM waves _______ travel the same speed in a vacuum. 

• never
• sometimes
• always
• can

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NGSS.HS-PS4-1

EM waves ________ a medium.

• require
• don't require
• can have
• sometimes have

_____ have the longest wavelengths and lowest frequencies of all electromagnetic waves.

• microwaves
• radio waves
• gamma rays
• ultraviolet

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NGSS.HS-PS4-1

This wave also means "below red."

• microwaves
• infrared
• gamma ray
• X-Ray

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NGSS.HS-PS4-1

All electromagnetic waves have _________ wavelengths and ________ frequencies.

• different, similar
• different, different
• similar, similar
• similar, different

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NGSS.HS-PS4-1

The relationship between wavelength and frequency is λ=c/f.  Calculate the wavelength of light that has a frequency of 5.2 x 10¹² 1/s. The speed of of light is 3.0x 10⁸ m/s.

• 5.8 x 10 ^-5 m
• 5.8 x 10 ^-7 m
• 5.19 x 10 ¹⁴ m
• 1.56 x 10 ²³ m

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NGSS.HS-PS4-1

Solve this problems using the equation: 
C = λν
If an AM radio station broadcasts at
9.95 x 10⁵ Hz, what is the wavelength of this radiation?

• 6.59 x 10^-28 m
• 1.01 x 10^-6 m
• 3.32 x 10^-3 m
• 302 m

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NGSS.HS-PS4-1

Calculate the wavelength of light that has a frequency of 5.2 x 10^{12 1}/s.

• 5.8 x 10 ^-5 m

• 5.8 x 10 ^-7 m

• 5.19 x 10 ¹⁴ m

• 1.56 x 10 ²³ m

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NGSS.HS-PS4-1

What are the units of frequency?

• m/s
• s
• Hz
• m

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NGSS.HS-PS4-1

NGSS.HS-PS4-4

IRAS, the Infrared Astronomy Satellite launched by NASA in 1983, had a detector that measured infrared or heat radiation from different regions of space. What is the frequency of infrared light that has a wavelength of

1.10 X 10^-6 m?

• 3.67 x 10^-15 Hz

• 3.67 x 10^-3 Hz

• 2.73 x 10² Hz

• 2.73 x 10¹⁴ Hz

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NGSS.HS-PS4-1