Optics Review Flashcards
What is a light wave?
A wave of electric and magnetic fields
What is the electromagnetic spectrum?
It consists of all the different wave lengths of electromagnetic radiation
What are the types of radiation from low to high energy?
Radio, microwaves, infrared, visible, ultraviolet light, x-rays, gamma rays
Examples of radio waves
Radio, TV signal, cell phone, radar
Examples of microwaves
Telecommunications, microwave ovens
Examples of infrared light
Remote control, lasers, heat detection
Examples of visible light
Human vision, rainbows, visible lasers
Examples of ultraviolet light
UV lasers, “black” light
Examples of x-rays
Medical imaging, cancer treatment, security equipment
Examples of gamma rays
Cancer treatment
What does SALT stand for?
Size, Attitude, Location, Type
What is regular (specular) reflection of light?
On shiny surfaces, light reflects following law of reflection, a clear image is seen
What is diffuse reflection of light?
On rough surfaces, the reflection of waves becomes irregular. Light spreads and no clear image forms
Colours that make up visible spectrum, low to high
Red, orange, yellow, green, blue, indigo, violet
What are the two kinds of light sources?
Luminous- object gives off own light, Non-Luminous- object doesn’t give off own light