Visible Light
What determines the color of an object?
Reflected visible light.
These type of waves can travel through empty space.
Light waves.
The sun emits only one type of light.
True or False
False, the sun emits many different types of light.
Can light from the sun cause some types of nail polish to change color?
Yes - if the polish absorbs any type of light from the sun.
Which rays from the sun are damaging to the skin?
Ultraviolet rays (UV rays).
Yellow flowers look yellow because they reflect this type of light.
Yellow light
The height of the wave is called the _______.
amplitude
Gamma rays, X-rays, and radio waves are all examples of ____________ waves that are not visible.
light
What are the three things that light waves can do when they hit an object?
What causes people have different skin tones?
The amount of melanin in your skin.
Which colors are reflected back when all colors of visible light hit a white object?
ALL colors of visible light are reflected back.
The __________________ of light determines its type.
Wavelength
Laser 1 is green.
Laser 2 is red.
Laser 3 is blue.
Which of these three lasers emits light that will be reflected off of a black t-shirt?
none of them will reflect
Santiago’s teacher showed him a kind of cloth that changes color if it is placed out in the sun. It does not change color if it is placed under a desk lamp. Why not?
It does not absorb light from the desk lamp, but it does absorb light from the sun.
Why do people get a "sun tan" after being in the sun.
Your body produces more melanin in response to sun exposure.
Do green plants use green visible light in the process of photosynthesis?
No - they reflect green light; they do not absorb it.
The amplitude of a wave determines its _______.
intensity or strength
Calcite is a type of rock that glows under a UV light lamp. It will not glow under any other light source. Why does it glow under UV light?
It absorbs only UV light.
Mr. Gerstner has a UV light that transmits through aluminum foil. He also has an infrared light that reflects off of aluminum foil. Which one of his lights will heat the foil up when he shines the light on it?
Neither light will heat the foil because neither is absorbed.
What must be damaged in order to cause skin cancer?
genetic material or DNA
All visible light goes through a clear object. This is called _______.
transmit or transmission
The distance between two peaks on one wave is called ________.
Wavelength.
Pedro has a special type of glass that he wants to melt. He wonders if light can cause the glass to melt. The list below shows what happens when different types of light hit the glass. Which one will melt the model?
A. Infrared light- Absorbed by the glass.
B. Yellow light- Reflected off the glass.
C. X-ray light- Transmitted through the glass.
A. Infrared light- Absorbed by the glass.
List all 7 of the types of light the sun emits.
Gamma rays, X-rays, Ultraviolet, visible (the colors), infrared, microwave, radio waves.
How does melanin help protect you from skin cancer?
Melanin acts absorbs UV light from the sun before it reaches your genetic material or DNA.