Light and Optics Flashcards

Flashcards about light and related topics, based on lecture notes.

ES- Radio

Radio, cellphone communication, AM/FM.

Microwave

Makes food fast, satellite transmission.

Infrared

Heal sunlight; gives off organisms.

Visible Light

Human eye sees colors.

UV

Sunlight.

Gamma Rays

Explosive radiation from supernovas.

Sun

Natural nuclear fusion, hydrogen into helium.

Fire

Combustion of carbon fuel source.

Lightning

Static discharge from thunderclouds.

Incandescence

High temperature of tungsten, inefficient.

Electric discharge

Heated sodium gas in streetlights.

Fluorescence

Chemical coating, UV light to visible light.

Chemiluminescence

Hydrogen peroxide, temperature increase, e.g., in glow sticks.

Bioluminescence

Natural living cells, e.g., fireflies.

LED

Not temperature-dependent, semiconductor.

Triboluminescence

Light produced by scratching or friction with rocks/minerals.

Dispersion

Visual (white) light is a combination of colors separated by a glass prism.

ROYGBIV

Red Orange Yellow Green Blue Indigo Violet; Different wavelengths, different speeds.

Primary Colors (Addition)

Red, Green, Blue. No mix of colors to make these.

Secondary Colors (Addition)

Magenta, Yellow, Cyan. Made by mixing primary colors.

Primary Colors (Subtraction)

Cyan, Magenta, Yellow. No form and made black.

Straight Line

Light travels through glass, water, air in this manner.

Transparent

Objects seen clearly through this.

Translucent

Objects not clearly seen through this.

Opaque

No objects seen behind this at all.

Law of Reflection

Angle of incidence equals angle of reflection.

Normal

Line perpendicular to mirror.

Incident ray

Light from a luminous source.

Reflected ray

Light coming off a surface.