Illuminance
Materials that allow light to pass through.
What is transparent?
The small particles that make up light.
What are photons?
When light hits a surface and travels back in the exact direction. Also known as the "normal".
What is reflection?
When light hits a reflective surface and changes directions.
What is refraction?
Who was Euclid?
Materials that do not allow light to pass through, creating a shadow.
What is opaque?
Visible light whose wavelengths travel in the same direction, and at the same speed. For example, a laser beam.
What is coherent light?
This states that the angle of incidence is always equal to the angle of reflection.
What is the law of reflection?
Refraction occurs because of wavelengths of light are doing this.
What is changing speeds, or slowing down?
In what year did Isaac Newton demonstrate the splitting of white light?
When was 1666?
Materials that allow partial light to pass through.
what is translucent?
This type of light's wavelengths are shorter than visible light. Humans cannot see them, however certain animals like snakes can.
What is infrared light?
The non-perpendicular angle at which light hits a reflective surface.
What is the angle of incidence?
Light travels the slowest through this material.
What is water?
This person patented the first incandescent light bulb in 1879.
Who was Thomas Edison?
The fully shaded region of a shadow.
What is the umbra?
This type of visible light contains electromagnetic radiation with wavelengths that are different lengths, that travel at different speeds.
What is incoherent light?
The total amount in degrees between the normal and the surface of a reflective plane.
What is 90 degrees.
When white light is split, the slowest wavelengths is this color.
What is red?
In 150AD this person discovered that light travels slower through liquids than gases and that it is refracted when it travels from air to glass.
Who was Ptolemy?
The partially shaded area of a shadow.
What is the penumbra?
True or False. Humans can see all portions of the electromagnetic gradient.
False.
If a beam of light hits a reflective plane at 56 degrees, what will the angle of incidence be?
True or false. If hold an image against a glass of water the image will be reversed on the other side.
False.
What year was Miss T born?
When was 1994?