2-1 Describe electromagnetic radiation in terms of waves and photons

2-1-1. Illustrated below is a snapshot of the electric field component of an electromagnetic wave as it travels through space. At which of the locations indicated would a charged particle experience the strongest force?

2-1-2. Which of the following wavelengths is associated with the electromagnetic radiation that humans can see?
A. 500 nm, B. 300 nm, C. 0.0005 cm

2-1-3. Which of the following regions of the electromagnetic spectrum has the longest wavelengths?
A. x-rays, B. visible, C. microwave, D. radiowave

2-1-4. What is the frequency of the electromagnetic wave with a wavelength of 250 nm?
A. 1.2x10⁶ Hz, B. 1.2x10¹⁵ Hz, C. 6.0x10¹⁴ Hz

2-1-5. What is the energy of a photon of ultraviolet radiation with a wavelength of 250 nm?
A. 5.0 eV, B. 2.5 eV, C. 4.0x10^-2 eV

2-1-6. Which of the following regions of the electromagnetic spectrum has the most energetic photons?
A. x-rays, B. visible, C. microwave, D. radiowave

2-1-7. Which of the following characteristics of electromagnetic radiation is not associated with what we perceive as color?
A. wavelength, B. frequency, C. wave speed, D. photon energy