EM Radiation
How many different types of EM radiation are there in the EM spectrum?
7
What type of diagram is used to show the path of light?
Ray (diagram)
Light can be reflected on what two (2) kinds of surfaces?
Smooth and rough surfaces.
The line that is perpendicular to the surface is called the ___________ line.
Normal.
Lens reflect OR refract light.
Refract.
Which type of EM radiation has the least energy?
Radio waves
Particle, since the particle would only have two options to pass through.
What is the term used to describe light "bending" in different mediums?
Refraction.
Name one (1) of the three (3) laws of reflection.
Bonus 100 for naming the other two (2).
Angle of incident = angle of reflection
The incident and reflected rays are on opposite sides.
The normal line and the incident + reflected rays all lie on the same plane.
Which type of lens is more dense in the middle?
Converging lens.
Decreases.
What is the term used to describe the # of cycles going through a point in 1 second?
Frequency (units: cycles / sec)
If a material is said to let all the light through, this material is ________________.
Transparent
(T or F) Plane mirrors create real images. You must CORRECT the statement if the statement is False.
False, it creates virtual images since the image is created behind the mirror.
Which part of the eye does most of the refraction happen?
Cornea
In remote sensing, which two (2) types of EM radiation are used?
Visible light and ultraviolet.
What is the term for small energy packets?
Photons.
You can somewhat see what is behind this type of material (i.e. is blurry).
Translucent.
In convex mirrors, the focal point lies in front OR behind the mirror.
Behind --> virtual image.
When viewing an object that is far away from your eyes, describe what the muscles around the lens is doing AND what happens to the shape of the lens.
Telescope uses which three (3) types of EM radiation to detect things in outer space?
Visible light, ultraviolet and infrared (heat)
In the photoelectric effect, photons of blue light ejected electrons from the metal surface because ___________________________.
In opaque materials, light rays are either ___________ and ____________.
Absorbed, reflected.
Concave mirrors: Which of the following creates a real image?
i. Object is far away from the focal point.
ii. Object is closer but not in front of the focal point.
iii. Object is in front of the focal point (and in front of the mirror).
i and ii.
Fill in the blanks:
For nearsighted people, the focal point lies ______________ of the retina.
For farsighted people, the focal point lies ________________ the retina.
Bonus 100 each for describing the shape of eye.
In front, behind