Photon Energy and Wavelength Calculations

This video tutorial by Michael from Chemistry covers practice problems involving wavelength, frequency, and energy. It introduces key equations, including the speed of light equation and Planck's constant, and demonstrates how to solve problems step-by-step. The tutorial includes examples of calculating frequency from wavelength, wavelength from frequency, and energy from both frequency and wavelength. It concludes with tips for studying chemistry effectively.

What is the speed of light in meters per second?

• 3 x 10^6 m/s

• 3 x 10^12 m/s

• 3 x 10^8 m/s

• 3 x 10^10 m/s

Which unit must wavelength be converted to before using it in equations?

• Meters

• Kilometers

• Centimeters

• Millimeters

If a wave has a wavelength of 625 nm, what is its frequency in Hz?

• 4.80 x 10^14 Hz

• 6.25 x 10^14 Hz

• 5.00 x 10^14 Hz

• 3.00 x 10^14 Hz

What is the frequency of blue light with a wavelength of 400 nm?

• 7.5 x 10^14 Hz

• 6.0 x 10^14 Hz

• 5.0 x 10^14 Hz

• 8.0 x 10^14 Hz

How do you calculate energy using frequency?

• E = c / λ

• E = λ / c

• E = h / v

• E = h * v

What is Planck's constant value?

• 6.626 x 10^-36 J·s

• 6.626 x 10^-32 J·s

• 6.626 x 10^-34 J·s

• 6.626 x 10^-30 J·s

How do you convert energy from joules to kilojoules?

• Multiply by 1000

• Multiply by 10

• Divide by 1000

• Divide by 10

What is the energy of a photon with a frequency of 7.5 x 10^14 Hz?

• 3.0 x 10^-19 J

• 4.0 x 10^-19 J

• 6.0 x 10^-19 J

• 5.0 x 10^-19 J

How do you calculate the wavelength from energy?

• λ = h / E

• λ = hc / E

• λ = E / hc

• λ = E / h

What is Avogadro's number used for in energy calculations?

• Converting frequency to wavelength

• Converting energy per photon to energy per mole

• Converting wavelength to frequency

• Converting energy to speed of light