Electromagnetic Wave Theory Physics High School

Select the correct order of waves on the EM Spectrum from low to high energy

• Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma

• Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio

• Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio

• Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma

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How are Electromagnetic waves different from Mechanical waves?

• EM waves have very short wavelengths

• EM waves transmit energy instead of matter

• EM waves can travel through the vacuum of space (without particles)

• EM waves can change direction by reflection

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Which is true about the speed of radio waves compared to light waves? They are...

• less energy & frequency, but still the SAME speed as the speed of light (300,000,000 m/s)

• less energy & frequency, so LESS than the speed of light (300,000,000 m/s)

• smaller wavelength, so LESS than the speed of light (300,000,000 m/s)

• more energy & frequency, so MORE than the speed of light (300,000,000 m/s)

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Wavelength and Frequency are related in that...

• they are always the same

• when one increases, the other decreases (inversely proportional)

• there is no correlation

• they both vary in an irregular pattern

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Which wave has the largest wavelength?

• A
• B
• C
• None (same wavelength)

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Which wave has the largest frequency?

• A
• B
• C
• None (same frequency)

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If all three are waves of light, which wave has the largest speed?

• A
• B
• C
• None (same speed)

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NGSS.HS-PS4-1

An electromagnetic wave in a vacuum has a wavelength of 0.07 m. What is its frequency in Hz?

• 4.3 x 10¹⁸ Hz

• 2.1 x 10¹⁶ Hz

• 2.1 x 10⁶ Hz

• 4.3 x 10⁹ Hz

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NGSS.HS-PS4-1

An electromagnetic wave in a vacuum has a frequency of 1.3 x 10⁵ Hz, what is it's wavelength in meters?

• 2.3 x 10³ m

• 3.9 x 10¹³ m

• 3.9 x 10³ m

• 2.3 x 10¹³ m

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