The text on the image reads: --- The rays of the Sun that cause tanning and burning are in the ultraviolet portion of the electromagnetic spectrum. These rays are categorized by wavelength: So-called UV-A radiation has wavelengths in the range of 320-380 nm, whereas UV-B radiation has wavelengths in the range of 290-320 nm. Submit | Request Answer **Part C** Which are more energetic, photons of UV-A radiation or photons of UV-B radiation? - o photons of UV-A radiation - o photons of UV-B radiation Submit | Request Answer **Part D** The UV-B radiation from the Sun is considered a greater cause of sunburn in humans than is UV-A radiation. Is this observation consistent with your answer to part (c)? - o yes - o no Submit | Request Answer --- There are no graphs or diagrams present in the image. **Educational Content: Understanding Ultraviolet Radiation and its Calculations** **Ultraviolet Radiation and Wavelengths** The rays of the Sun that cause tanning and burning are in the ultraviolet portion of the electromagnetic spectrum. These rays are categorized by wavelength: - **UV-A Radiation**: Has wavelengths in the range of 320-380 nm. - **UV-B Radiation**: Has wavelengths in the range of 290-320 nm. **Calculating Frequency and Energy of Light** **Part A: Calculating the Frequency of Light** Goal: Calculate the frequency of light with a wavelength of 330 nm. - Frequency (\( \nu \)) can be calculated using the formula: \[ \nu = \frac{c}{\lambda} \] where: - \( c \) is the speed of light (\(3.00 \times 10^8 \text{ m/s}\)), - \( \lambda \) is the wavelength. Input box for answer: Unit is \( \text{s}^{-1} \). **Part B: Calculating Energy of a Mole of Photons** Goal: Calculate the energy of a mole of 330 nm photons. - Energy (\( E \)) can be calculated using the formula: \[ E = \frac{h \cdot c}{\lambda} \times N_A \] where: - \( h \) is Planck's constant (\(6.626 \times 10^{-34} \text{ J}\cdot\text{s}\)), - \( N_A \) is Avogadro's number (\(6.022 \times 10^{23} \text{ mol}^{-1}\)). Input box for answer: Unit is \( \text{kJ/mol} \). **Interactive Components** - The document contains interactive input boxes for users to calculate and submit their answers. - Users can request assistance if needed.