Light

In Glogpedia

by caanha
Last updated 6 years ago

Discipline:
Science
Subject:
Physics

TV's & monitors generate light, but paints & dyes reflect light.

Speed of light: 670,616,629 mph

Light

THEORIES OF LIGHTWave theory: Proposed that light was a longitudinal wave, and that this wave was propagated through a material called the 'aether'. -HuygensParticle Theory: Proposed that light was shot out from a source in small particles.-NewtonQuantum-mechanical theory: Light is viewed as tiny packets of waves.-Maxwell

Aether- it must fill all space and be weightless and invisible.

When the frequency is high, the wavelength is shorter. Formula: λv=c

"Color is the visual effect that is caused by the spectral composition of the light emitted, transmitted, or reflected by objects." -Color logic

3. Eye sees reflected color and tells the brain what it is.

The light from the sun, as we see it, has no color. Although, it is a rainbow, for all of the colors of the spectrum are there.

1. "Invisible" sun rays shine on apple.

2. Apple absorbes all color rays except for red.

The angstrom unit is a measure of displacement equal to (10 -10 m).

Wavelengths- the distance between the top of one wave and the top of the next

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves

The types of light are: Ambient, accent, task, asthenic, natural, tungsten, spotlight, Halogen, fluorescent, and incandescent.

The pupil is the black part of the eye that takes in the light. The iris regulates the light. The retina sends messages to the brain. The lenses focus on the image.

The angle of reflection equals the angle of incidence

Angle of Incident- the angel of the light ray from a flashlight made w/the perpendicular line.

Angle of reflection- angle the relfected light ray made w/the perpendicular line.

Order of the rainbow: ROYGBIV

Iris- a colored ring-shaped membrane that has an adjustable circular opening called the pupil which can open or close depending on the amount light coming into the eye.

Behind the pupil there is a transparent, colorless lens called the crystalline lens. Ciliary muscles surround the crystalline lens. They hold the lens in place but they also have an important part in vision. When the muscles relax, they pull on the flatten lens to see far away, but to see closer the ciliary lens must contract to thicken the lens.

Rods in the eye are used for monochrome vision in poor light. The lenses in our eyes change the direction of light waves, because the lenses are curved.

Concave lenses are thinner at the center than at the edge.Light reflects on and off of things and that's how we see light. Convex