Vocabulary 1
What do you call objects that do not allow any light to pass through them?
Opaque objects
What makes a pencil look broken when it is placed in a cup of water?
Refraction
Which color in the rainbow has the lest amount of energy? (low frequency, long wavelength)
Red
What does white light represent?
White light is a mixture of all colors
What do you call objects that allow some light to pass through them?
Translucent objects
Explain an example of when light reflects and an example of when light refracts.
Reflect- mirror, reflectors, etc. Refract- straw in water, arm in pool, etc.
Which 2 are true about light?
a) Light travels in compression waves.
b) Light does not need a medium to travel.
c) Light travels faster through solids than liquids.
d) Light travels in transverse waves.
b and d
Give three examples of transparent objects.
Glass, Windows, Clear Plastic, etc.
What is the term for when light waves bend when passing from one medium to another?
Refraction
Light can travel through objects. It can also do 3 different things. What are they?
Light can be reflected, refracted, and absorbed.
Explain why a shadow appears on the screen when I place my hand in front of it.
My hand blocks the sun from hitting the whiteboard
List the colors of the rainbow in order.
Red, orange, yellow, green, blue, violet
What is the word for a current piece of technology that transforms light energy into electrical or mechanical energy?
Solar Panels
What tool can be used to separate white light into all colors of visible light?
A prism
How does a mirror reflect light?
In the opposite angle it is hitting.
\ /
\ /
_______
Give an example of light energy transforming into thermal energy.
Space heater heating a room, the sun heating a black shirt, the sun making the roads hot
What is the shortest wavelength and the longest wavelength in the rainbow?
Longest: Violet
Shortest: Red
What is the highest point and lowest point in a wave called?
Highest: Crest
Lowest: Trough
What is the word that describes the distance between to equal points in a wave?
Wavelength
What form of radiant energy can be seen with the human eye and interacts differently with different objects?
Visible Light
Which 2 are true with radiant energy and plants?
a) Light interacts with the roots to create cellulose.
b) Light transfers radiant energy and warms the Earth.
c) Light facilitates plant growth through the process of photosynthesis.
d) Light increases the thickness of the cell wall so the plant can grow toward the sun.
b and c
What is the color black a representation of?
The absorption of all colors