EM Spectrum Review

As the wavelength of a wave increases, which is also true?

• The energy of the wave will increase.
• The speed of the wave will increase.
• The frequency of the wave will decrease.
• Planck's constant will decrease.

Visible light occupies the range of wavelengths from 380 to 790 nanometers in the electromagnetic spectrum. Which of the following kinds of electromagnetic radiation has shorter wavelength than visible light?

• Infrared radiation
• Microwaves
• Radio waves
• X-rays

Calculate the wavelength of the yellow light emitted by the street light, if the frequency of the radiation is 5.10x10¹⁴Hz.

• 5.12 x 10^-7m

• 5.88 x 10^-7 m

• 4.20 x 10¹⁴m

• 3.0 x 10⁸m

Energy is measured in........

• Wavelength

• Meters

• Joules

• Frequency

Red light has a wavelength of 675 nm.  What is its frequency?

• 2.03x1011 m
• 4.44x1014 Hz
• 4.44x1014 nm
• 2.03x1011 Hz

The frequency of violet light is 7.5x1014 Hz.  What is its wavelength? 

• 4.0x10-7 m
• 4.0x107 m
• 2.25x1023m
• 2.25x1023 Hz

What is the variable λ used for?

• frequency

• wavelength

• Energy

• speed of light

Calculate the energy of light with a frequency of 5.10 x 10¹⁴ Hz.

• 3.38 x 10^-19 J

• 5.88 x 10^-7 J

• 9.62 x 10¹² J

• 1.04 x 10^-13 J

What is the frequency of ultraviolet light with a wavelength of 1.24 x 10^-7 m?

• 2.42 x 10¹⁵ Hz

• 8.22 x 10^-34 Hz

• 3.00 x 10⁸ Hz

• 1.04 x 10¹³ Hz

What is the frequency of infrared light with a wavelength of 1.05 x 10^-6 m?

• 6.96 x 10^-40 Hz

• 2.86 x 10¹⁴ Hz

• 9.62 x 10^-13 Hz

• 2.55 x 10^-19 Hz