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EMW general

1

The range of Electromagnetic waves according to their energy and frequency is called ____.

EM Spectrum

electro magnetic spectrum

2

The speed of light has a constant value of ____.

3.0 x 10 ^ 8 m/s

3

In the EMW spectrum, as the frequency increases, the WAVELENGTH  _____.

decreases

4

Who discovered that magnetic fields can produced by electric current?

Hans Christian Oersted

5

How do electric and magnetic fields move as the EMW travels?

perpendicular

"F" with benefits

1

The most common use of infrared laser as point-to-point communication is through what object or device?

TV remote control

2

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.

3

This EMW is important in the production of Vitamin D.

Ultraviolet

4

What technology is associated with the transmission of information as light pulses along a glass or plastic strands?

Fiber optics

5

The picture signals in Television broadcasting are carried by what carrier waves?

AM carrier

kasi sound signals naman is for FM carrier.

Ugh! shet sakit

1

What is the most harmful type of UV ray?

C

2

This great source of energy is still a debatable issue for its benefit and danger.

Nuclear energy

3

Which part of the body X-ray cannot penetrate?

bones

4

Which color of light is the most damaging to the human eye?

blue

5

a type of high energy radiation that knocks electrons off in an atom causing the atom to be charged or ionized.

ionizing radiation

Look at me now!

1

it is the bouncing back of light

reflection

2

the objects we are seeing inside the mirror is called ____. 

image

3

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

4

all light that hits a concave mirror will be reflected on a certain point called ____.

focus

focal point

5

It is an imaginary line perperdicular to the mirror at the point where the incident ray hits the mirror.

normal line

50/50

1

We can see infrared and ultraviolet rays.

False

2

Humans can produce microwave radiation.

False

3

UV and gamma rays are used in sanitizing medical and surgical equipment in hospitals.

True.

4

In a convex mirror, the object we see is always virtual.

FALSE. because it is the image that is always virtual. Objects are real.

5

A mirror always produce images that are vertically or laterally inverted.

TRUE