Optics Flashcards
(20 cards)
Define incandescence
Production of light by heat: ex. light bulb
Define chemiluminescence
Production of light by a chemical reaction: ex. glow stick
Define phosphorescence
Prolonged production of light resulting from the absorption of UV light: ex. glow in the dark paint
Define bioluminescence
The production of light by plants and animals: ex. jellyfish
Define fluorescence
Immediate production of light resulting from the absorption of light: ex. highlighters
Name the different types of light in the electromagnetic spectrum in order of wavelengths
Radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, gamma rays
Define wavelength
The distance from crest to crest
Define crest
The highest point of a wavelength
Define trough
The lowest point of a wavelength
What is the law of reflection?
θr = θi
What structure controls the amount of light that enters the eye?
The iris
Explain the difference between myopia and hyperopia
Myopia: (near sightedness) object near appears clear but objects far appear blurry
Hyperopia: (far sightedness) object far appears clear but objects near appear blurry
Explain the difference between myopia and hyperopia
Myopia: (near sightedness) object near appears clear but objects far appear blurry
Hyperopia: (far sightedness) object far appears clear but objects near appear blurry
2 practical uses of concave mirrors
Magnifying glass, cosmetic mirror
2 practical uses of convex mirrors
Rear view mirror, telescope
Why type of lense should people who have hyperopia wear?
Convex
What type of lense should people who have myopia wear?
Concave
Define refraction
The bending of light
List the 2 parts of the eye that can refract light
Cornea & lens
What is the use of the retina?
The light sensitive layer of tissue at the back of the eye that absorbs and converts light into electrical impulses.
