EMW general
The range of Electromagnetic waves according to their energy and frequency is called ____.
EM Spectrum
electro magnetic spectrum
The most common use of infrared laser as point-to-point communication is through what object or device?
TV remote control
What is the most harmful type of UV ray?
C
it is the bouncing back of light
reflection
We can see infrared and ultraviolet rays.
False
The speed of light has a constant value of ____.
3.0 x 10 ^ 8 m/s
It is a branch of medicine that uses imaging technology to diagnose and treat ailment or diseases.
Radiology
imaging is the term used for any method to take pictures of bones, teeth and other organs in the body.
This great source of energy is still a debatable issue for its benefit and danger.
Nuclear energy
the objects we are seeing inside the mirror is called ____.
image
Humans can produce microwave radiation.
False
In the EMW spectrum, as the frequency increases, the WAVELENGTH _____.
decreases
This EMW is important in the production of Vitamin D.
Ultraviolet
Which part of the body X-ray cannot penetrate?
bones
a type of reflection where all incident light rays reflect with the same angles due to the smooth and flat surface it hit.
specular reflection
UV and gamma rays are used in sanitizing medical and surgical equipment in hospitals.
True.
Who discovered that magnetic fields can produced by electric current?
Hans Christian Oersted
What technology is associated with the transmission of information as light pulses along a glass or plastic strands?
Fiber optics
blue
all light that hits a concave mirror will be reflected on a certain point called ____.
focus
focal point
In a convex mirror, the object we see is always virtual.
FALSE. because it is the image that is always virtual. Objects are real.
How do electric and magnetic fields move as the EMW travels?
perpendicular
The picture signals in Television broadcasting are carried by what carrier waves?
AM carrier
kasi sound signals naman is for FM carrier.
a type of high energy radiation that knocks electrons off in an atom causing the atom to be charged or ionized.
ionizing radiation
It is an imaginary line perperdicular to the mirror at the point where the incident ray hits the mirror.
normal line
A mirror always produce images that are vertically or laterally inverted.
TRUE