All Flashcards
What is the effect of increasing the frequency of an electromagnetic wave?
Increasing the frequency increases the energy of the wave.
What is the effect of decreasing the wavelength of an electromagnetic wave?
Decreasing the wavelength increases the frequency and energy of the wave.
What is the effect of exposure to high-intensity ultraviolet radiation?
Exposure to high-intensity ultraviolet radiation can cause skin damage, sunburn, and increase the risk of skin cancer.
What is the effect of passing light through a medium with a refractive index greater than 1?
The speed and wavelength of the light decrease, but the frequency remains the same.
How are electromagnetic waves generated?
Electromagnetic waves are generated by the vibration of charged particles, which creates oscillating electric and magnetic fields that propagate through space.
Describe how to calculate frequency given wavelength and speed of light.
- Recall the formula:
- Rearrange the formula to solve for frequency:
- Substitute the values of the speed of light (c) and wavelength (λ) into the formula.
- Calculate the frequency (f).
Compare and contrast radio waves and gamma rays in terms of wavelength, frequency, and energy.
Radio Waves: Longest wavelength, lowest frequency, lowest energy. Gamma Rays: Shortest wavelength, highest frequency, highest energy.
Compare and contrast the effects of high-frequency and low-frequency electromagnetic waves on living tissue.
High-Frequency (UV, X-rays, Gamma rays): High energy, can be harmful, cause ionization. Low-Frequency (Infrared, Microwaves, Radio waves): Lower energy, generally not harmful, cause heating.