Characteristics of Light
Contains 1 _____ field and 1 _____ field that flow perpedicular to each other
Magnetic/Electronic
What waves has the highest energy?
Gamma ray.
What happens during reflection?
Light waves bounce off of a surface and reflect in the opposite direction (on a smooth surface) or go in random directions (rough surface)
Do these waves require a medium. (Full answer required)
No, but the light waves can use a medium. ex. prisms, mirrors, and lenses.
*This is shown as absorption, reflection, and refraction.
What is a Radar and what does it stand for?
A radar is a device or system of a transmitter that emits radio waves and contains a reciever that processes their reflections.
Radio Detection and Ranging
What happens during refraction and how does it affect wave speed?
Waves bend as they transition into a different medium. The speed changes since different mediums affect speed.
The ability to think of light waves as ____ and ____ is called "the dual nature of light"
Waves/Particles
What is modulation?
The process of varying radio waves.
Name the order of states of matter (vacuum included) that light travels through from fastest to slowest.
Vacuum, gas, liquid, solid.
Name all parts of the electromagnetic spectrum in order from longest wavelength to shortest.
Radio waves, micro waves, infrared waves, visible light, UV radiation, X Rays, gamma rays.
Name 2 relationships between light waves and wave parts.
Energy is directly proportional to the frequency
Brightness (intensity) is directly proportional to the amplitude of a wave
Velocity is constant, so frequency and wavelength have an inversely proportional relationship
Give an example of all wave types IN ORDER
Infrared Radiation- the part of sunlight that feels warm, thermograms, shows heat loss in homes, can see humans and animals in total darkness
Visible Light-ROYGBIV
UV Radiation-Tanning beds
X-Rays-Imaging for medical purposes (x-rays) or security
Gamma Rays- radiotherapy is made of these waves, and this is used to kill cancerous cells.