Chemistry Light and Energy Equations

Which of the following frequencies corresponds to light with the longest wavelength?

• 3.00 x 10¹³ Hz

• 4.12 x 10⁵ Hz

• 8.50 x 10²⁰ Hz

• 9.12 x 10¹² Hz

• 3.20 x 10⁹ Hz

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What is the wavelength of red light with a frequency of 4.55 x 10¹⁴ Hz?

• 0.000000659 m

• 1.37x10²³ m

• 3.01x10^-19 m

• 6.87x10⁴⁷ m

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Which of the following pairs are incorrect?

• wavelength -λ

• frequency - ν

• speed of light - c

• hertz - 1/s or s^-1

• x-rays - shortest wavelength

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A line in the spectrum of atomic mercury has a wavelength of 2.56x10^-7 m. The frequency of this light is ___.

• 8.54 x 10^-16 Hz

• 7.76 x 10^-19 Hz

• 1.17 x 10¹⁵ Hz

• 76.7 Hz

• none of these

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Which of the following types of radiation has the shortest wavelength, the greatest energy and the highest frequency?

• Ultraviolet radiation

• Infrared radiation

• Visible red light

• Visible blue light

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Yellow light can have a wavelength of 5.99x10^-7 m. The energy of one photon of this light is ___.

• 1.19 x 10^-31 J

• 5.99 x 10^-7 J

• 3.32 x 10^-19 J

• 5.01 x 10¹⁴ J

• 3.02 x 10¹⁸ J

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What is the energy of a photon of blue light that has a frequency of 6.31 x 10¹⁴ Hz?

• 4.75 x 10^-7 J

• 4.18 x 10^-19 J

• 6.31 x 10¹⁴ J

• 9.44 x 10^-32 J

• 2.39 x 10^-32 J

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Which of the waves shown is the lowest energy radiation?

• A

• B

• C

• All three waves are at the same energy.

• None of these.

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NGSS.HS-PS4-4

For which of the following transitions does the light emitted have the longest wavelength?

• n=4 to n=3

• n=4 to n=2

• n=4 to n=1

• n=3 to n=2

• n=2 to n=1

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