Waves
The distance from the crest to the resting point
Name one natural light source?
Ex: sun, stars,
True or False: Light is a form of energy
True
True or False, All colors have the same wavelength
False
Wavelength
Give an example of a man-made light source
Ex: candle, light bulb,
This type of material allows NO light to pass through and forms a shadow behind it.
Opaque
True/False: Rocks can glow under certain types of light because the light certain types of lights are absorbed, causing them to glow.
True
What is the frequency of a wave?
The number of waves that pass in a certain amount of time.
Light can interact with an object in three ways
Absorb, reflect and transmit
True or false: Xray light is reflected off of lead. Therefore, it will change the lead and the object underneath the lead.
False
People in Austrailia have a higher risk of skin cancer for two major reasons. Name one.
1) They, on average, has less melanin in their skin. 2) Australia gets more ultraviolet light because of the atmosphere
When the colors of light combine, which type/color of light?
white
Draw a wave with a high frequency and one with a slow frequency. Label each.
many answers
Melanin protects DNA and genetic material by __________ Ultraviolet light
absorbing
The dentist shines an ultraviolet light to harden the clay in a cavity. Why does this happen? Use absorb, transmit or reflect to explain.
The clay is absorbing (taking in) energy from the ultraviolet light. which hardens it.
This type of material lets MOST light pass through.
What is transparent?
This is why an apple looks red.
All of these colors are absorbed and red wavelength is reflected.
Which types of light are more dangerous to people? Use frequency and wavelength in your answer
Ultraviolet, Xrays and Gamma rays. They all have a high frequency and short wavelength.
A rug sits in a sunny room for a long time. Can light from the sun cause the rug's color to fade? Why? Use vocabulary
Yes, energy from the light is absorbed (taken in) causing the colors to fade.
Jonathan is testing a special paper. He notices that Infrared light is reflected, Xray light is transmitted and ultraviolet is absorbed. Which type of light will change the paper?
Ultraviolet light will change the paper because it is absorbed.
Elizabeth noticed that she gets hotter on sunny days when she is wearing dark clothes but cooler when she wears light colors. Why is this?
light from the sun is absorbed in dark colors but is reflected off of light colors.
Why do dark colors warm up faster in the sun?
The dark colors absorb more light energy, light colors reflect more light energy.