1e2 Frequency, wavelength and energy of light emission

Multiple Choice

A certain photon of light has a wavelength of 4.22x10^-7nm. What is the frequency? (v=c/λ)

• 7.11x10¹⁴ Hz

• 7.11Hz

• 1.41x10^-15

• -1.41x10¹⁵

Multiple Choice

What is the energy of a photon with a frequency of 5.0 x 10¹⁴Hz?

• 2.5 x 10^-19 J

• 3.3 x 10^-19J

• 3.0 x 10^-19J

• 4.5 x 10^-19J

Multiple Choice

What is the energy of a quantum of light with a frequency of 7.39x10¹⁴Hz.(E=Hv)

• 4.88x10¹⁹

• 4.88x10^-19

• 2.22x10²³

• 2.22x10^-23

Multiple Choice

Certain blue lights have a frequencey of 6.91x10¹⁴Hz. What is the wavelength? (λ=c/v)

• 4.34x10²¹

• 4.34x10^-21

• 4.34x10^-7

• 2.07x10²³

Multiple Choice

What is the wavelength for a quantum of light with energy of 7.56x10^-19J? (λ=hc/E) 

• 2.62x10^-7m

• 2.62x10⁷m

• 2.64x10^-45m

• 2.64x10⁴⁵m

Multiple Choice

A light has a wavelength of 5.06x10^-7m. What is the frequency of the light? What is the color of light? (v=c/λ)

• 16.87Hz, Red

• 5.93Hz, Orange

• 5.93x10^-14Hz, Blue

• 5.93x10¹⁴Hz, Green

Multiple Choice

Solve this problems using the equation: C = λ  x  ν
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

• 301 m

Multiple Choice

Microwaves are used to cook food and transmit information. What is the wavelength of a microwave that has a frequency of 3.44 × 10⁹ Hz?

For this problem, what formula do you use?

• c = λν

• E = hv

• λ = c/v

• v = c/λ

Explanation Slide...

λ= wavelengthv= frequencyc= speed of light in a vacuum/3.00 × 108 m/s