Speed of Light Calculations

A beam of light has a wavelength of 600 nm in air. What is the frequency of the light (c = 3x10⁸ m/s)?

• 5 x 10¹⁴ Hz

• 2 x 10¹⁴ Hz

• 3 x 10¹⁴ Hz

• 6 x 10¹⁴ Hz

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Find the distance a radio wave will travel in 0.250 s.

• 7.50 × 10⁷ m

• 5.60 × 10⁷ m

• 1.20 × 10⁹ m

• 1.35 × 10⁹ m

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Find the frequency of an electromagnetic wave with a wavelength 2.75 × 10^–8 m.

• 1.10 Hz

• 1.09 × 10¹⁶ Hz

• 9.17 × 10¹⁵ Hz

• 9.17 × 10¹⁶ Hz

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Which of the following electromagnetic waves travels the fastest?

• gamma rays

• radio waves

• ultraviolet waves

• they all travel the same speed

if electrons vibrate up and down 1000 times in a second, they will create and electromagnetic wave having ______.

• a wavelength of 1000 meters

• a speed of 1000 m/s

• a frequency of 1000 Hz

• an amplitude of 1000 M

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Mr. H catches the news on 780 AM, which broadcasts at 780. kHz. Determine the wavelength of these radio waves.

• 3.85 x 10⁵ m

• 385 m

• 3.85 x 10⁴ m

• 3.85 x 10⁶ m

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Determine the frequency of electromagnetic radiation which would have a wavelength of 1.0 mile (1.6 km).

What part of the electromagnetic spectrum does this fall within? (You will need to look at an EM Spectrum to determine).

• radio waves

• infrared waves

• visible light

• ultraviolet waves

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