Waves
What is Wavelength?
It is the length of a full cycle of a wave. (The distance from crest to crest
What is the incidence ray?
The ray of light coming in.
What are the 2 types of lenses?
Convex lens and Concave lens
What are optical fibers made of?
Thin strands of glass or plastic.
How has information technology changed over the years?
It has become lighter, faster, more efficient and more accessible.
What is Amplitude?
It is the 'size' of a wave. It is measured from the equilibrium position (or the central line) to the crest.
What is total internal reflection?
It is the complete reflection of light inside an object that doesn't let it escape.
What does a concave lens do to light rays?
Causes it to spread apart/diverges it.
What are fiber optics made of?
Thin strands of glass or plastic
How does information travel through the ocean?
Through a giant cable going through the ocean floor
What is frequency?
Frequency is the number of complete waves to pass a point every second.
What allows the light rays to bounce off of a mirror without being scattered?
The flat and smooth surface that the mirror has.
If you have myopia, what type of lens do you use in your glasses?
Concave lenses.
What is the function of fiber optics?
They send information coded in a beam of light
Which situations make your phone run out of battery faster?
When you are indoors, in rural areas, or while moving at high speeds.
What are all the different types of waves?
Radio, Microwaves, Infrared, Visible, Ultraviolet, X-Ray and Gamma-ray.
What is the law of reflection?
The angle of incidence = angle of reflection.
What is the difference between concave and convex mirrors?
Concave mirrors magnifies the image while convex mirrors diminishes the image
What is reduced in optic fibers?
Signal loss
Why is a cell phone called “Cell Phone?”
Because of the system of towers, antennas, and transmitters called “cells”.
Which waves can harm the body and how do they harm it?
X-Rays, Gamma rays, and Ultraviolet waves affect the body through radiation and eventually can lead to cancer.
What are the things a convex mirror does to an image?
the image is reflected upright and diminished (mostly)
What type of mirrors are in a car's rear view mirror?
Convex.
What are 3 ways optical fibers can be used?
Cable T.V., internet, decoration, endoscopes, sensors
How does information travel?
When you text the radio waves coming from your phone are sent to a tower, then it converts them into a digital electrical impulse, which is sent to the mobile switch center. It then tries to locate the closest tower within the receiver. When it does it reaches the receiver(the person you were texting).