9. Quantum Mechanics

Which of the following is closest to the wavelength of light emitted by an LED made from GaAs (gallium arsenide), given that its band gap energy is approximately 1.43 eV?

In the Balmer series of hydrogen, what is the wavelength (in nm) of the spectral line corresponding to the electron transition from n = 4 to n = 2?

Which of the following is closest to the wavelength of red light in the visible spectrum?

Which of the following statements correctly describes the relationship between wavelength and frequency for visible light in the range of 400 to 700 nm?

Which type of visible light spectrum is produced by the Sun?

Which equation allows you to calculate the wavelength of electromagnetic radiation if you know only its frequency?

As the wavelength of electromagnetic radiation becomes shorter, what happens to its energy?

A single photon has an energy of 3.29 × 10^{-19} J. What is the wavelength of this photon in nanometers?

A photon has an energy of 3.9 × 10^{-18} J. What is its wavelength?

Which of the following best describes the relationship between the wavelength and frequency of electromagnetic radiation?

A photon has an energy of 0.30 eV. What is its wavelength in nanometers (nm)? (Use 1 eV = 1.602 × 10^{-19} J, h = 6.626 × 10^{-34} J·s, and c = 3.00 × 10^{8} m/s.)

Which of the following colors of visible light has the shortest wavelength?

What is the frequency (s^{-1}) of light that has a wavelength of 1.23 \(\times\) 10^{-6} cm? (Speed of light, c = 3.00 \(\times\) 10^{10} cm/s)

Which color corresponds to the hottest stars?

Which of the following best describes the relationship between the wavelength and frequency of light?