Waves
Sound wave is a type of?
Longitudinal wave
What do you call the angle where the light hits a flat mirror?
Incidence Angle
What type of wave from the electromagnetic spectrum is used to do exams in the hospital (broken bones)?
X-ray
How has information technology changed over the years?
It became faster and lighter
Frequency is measured in _____.
Hertz (Hz)
Light wave is an example of?
Transversal wave
What do convex mirrors do to light?
Diverge
What are all categories of the electromagnetic wave spectrum?
Radio, Microwave, Infrared, Visible, Ultraviolet, X-Ray, Gamma
What are other uses for optical fibers?
Internet, cable tv, and decoration
What is the size of a wave?
Amplitude
Waves do not transfer ____
matter
Why mirrors reflect?
Its microscopic surface is smooth, unlike paper.
What are the colors of the visible light?
Violet , indigo, blue, green, yellow, orange, red.
How does the internet travel across the oceans?
Through a giant cable that runs through the ocean floor (undersea cables)
What is frequency?
The number of complete waves to pass a point every second.
What are the two types of waves?
Longitudinal & Transverse
What type of lenses do people with Myopia need?
Concave
What is the visible spectrum of light?
Wavelength from 400 to 700 nm.
Optic fibers are made of?
The top of the wave is called?
Crest
Electromagnetic waves affect damage cell-tissue organs?
No
How do concave mirrors invert the image?
The light hits the curved corners, and reflect in an angle.
Electromagnetic waves used in sunbeds and in security inks.
Ultraviolet
How does a radio work?
You tune a radio into a station then, you pick information that is sent out via electromagnetic waves at a particular frequency - radio wave.
What is wavelength?
It is the length of a full cycle of a wave (the distance from crest to crest or from trough to trough).