Boring Physics
What are the two types of waves?
Transverse and longitudinal
What is wavelength?
It is the length of the full cycle of a wave
What is amplitude?
It is the “ size “ of wave
All waves travel at which speed?
The speed of light
Are optical fibers better than copper wires?
Yes
What is the only thing that wave transports?
Energy
What is frequency?
The number of complete waves to pass a point every second
How do we measure frequency?
Hertz
What is light?
An electromagnetic wave
Why are high energy waves dangerous?
Because they cause skin cancer due to ionization. Ionization damages skin cancer
What happens to the light rays in a convex lense?
The light rays converge
What happens to the light rays in a concave lense?
The light rays diverge
What happens to the light rays in a convex mirror?
The light rays diverge
What happens to the light rays in a concave mirror?
The light rays converge
Describe the property of lateral inversion
It is the reversal of left-right in an image
What type of lense should be used in the glasses of someone with myopia?
Concave lenses
What type of lenses should be used in the glasses of someone with hyperopia?
Convex lenses
What are three functions of fiber optics?
Decoration, internet, and endoscopies
What is total internal reflection?
It occurs where the angle of incidence of the light is above a certain critical angle, reflecting light back at the boundary between two media
In one sentence, how does fiber-optics work?
It sends information coded in a beam of light down a glass or plastic pipe
What is the law of reflection?
Angle of incidence = angle of reflection
What are the fiber optic pipes made of?
Glass or plastic, both very thin
How does light rays travel in optical fibers?
Light travels down a fiber-optic cable by bouncing repeatedly off the walls in the total internal reflection angle
How are angles in a plane mirror measured?
From the normal to the ray
Why can't we see our reflection in a piece of paper?
Because, closeup, a paper has a rough texture. So, the light rays bounce off in different directions