Light Waves and Rays
A kind of energy you can see. 2 words
Light energy
The bouncing of light off an object called
Reflection
A kind of energy you can see.
Light
When light bounces off a reflective surface it bounces off the surface at the same angle that it hit the surface. This angle is called
Angle of reflection
The visible light spectrum is a very ___________
part of the electromagnetic spectrum.
Small part and the unaided eye cannot see the other parts of the electromagnetic spectrum.
The greatest source of light on earth
The Sun
An object that absorbs all light is said to be
Opaque
What is the greatest source of light on Earth?
The sun of course!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
What is luminous?
An object that gives off light
In the electromagnetic spectrum, the longest waves are ________________ waves and the shortest waves are _________________ rays
Radio waves are the longest and Gamma rays are the shortest
Light travels in what types of waves
Transverse
An object that allows all light through is said to be
Transparent
What is the effect of a prism on whitelight?
The refraction of white light through a prism breaks white light into all the colors of the visible light spectrum
Both periscopes and telescopes use the law of ________ to work perfectly
Reflection
Light travels in straight paths. until it hits an object.
When it bounces off an object it is said to be _________
When it is bent it is said to be ________
When passes through it is said to be __________
Bounces= Reflected
Bent= Refracted
Passes through= Transmitted
The color of light you see when white light passes through a prism is because of the waves ____________ when it reaches the other side.
List the rays of light from Fastest to slowest frequency
Frequency
Violet
Indigo- in some books
Blue
Green
Yellow
Orange
Red
An object that allows only some of the light through is said to be
Translucent
Light , like sound, needs a medium to travel through.
Yes or no?
No
Answers are white and black
Light is reflected off a surface ...if all the color is absorbed by the object the the color will appear to be ______________. If all the colors are reflected back the object will appear _______________
Black
White
A the type of ray that can cause damage to the skin is which type of ray?
Ultraviolet
Light travels at what speed and light from the sun can reach the earth in how many minutes.
Does sound travel faster than light?
186,000 miles a second and reach the earth in approx. 8 1/2 minutes.
No.
When an object prevents light from passing through it creates a _________ on the other side
Shadow
The smallest unit of light is called a ___________
Photon
Use the data below to draw a conclusion about the change in temperature during the day in the garage. How did the sun affect this change? 5:00pm-85 degrees Fahrenheit 7:00pm-80 degrees Fahrenheit 10:00pm-70 degrees Fahrenheit
The temperature got colder. The sun set so there was less heat.
How do lenses help us see better?
Lenses bend light to make objects larger, smaller and/or clearer.