Waves

Question 1

What is the nature of electromagnetic waves?

Answer 1

It’s both electric and magnetic in nature so it contains electric field and magnetic field.

Question 2

How is Em waves produces?

Answer 2

By constantly changing electric fields and magnetic fields

Question 3

What is a magnetic field?

Answer 3

A magnetic field in a region of space produces magnetic forces

Question 4

What is an electric field?

Answer 4

An electric field in a region of space it starts electric forces on charged particles.

Question 5

Can electromagnetic wave travel to in a vacuum?

Answer 5

Yes, all electromagnetic waves can travel to a medium but unlike other types of waves they can also travel in a vacuum.

Question 6

How fast did it travel in a vacuum?

Answer 6

Good travel in a vacuum at a speed of 3x10⁸ m/s and denoted a c, the speed of light

Question 7

What equation does the waves, speed, frequency, and wavelength are related to?

Answer 7

v= wavelength•Frequency

Question 8

Wavelengths can be defined as _____ between two successive crest or through a wave

Answer 8

Distance

Question 9

As wavelength ______, The frequency of the wave ______

Answer 9

Decreases, Increases

Question 10

True or false: electromagnetic waves transfers energy to a vacuum

Answer 10

True

Question 11

True or false: A wave is a disturbance that transfers energy

Answer 11

True

Question 12

What is used in communicating over large distances (like radar, satellites, aircraft, and ships) because of their wavelengths can bend around large obstacles. Low frequency _____ reach more areas than, high frequency _____

Answer 12

Radio waves

Question 13

Long wavelength _____ are produced by antenna and are used for communications but they cannot pass through obstacles that is why the _____ transmitters should be positioned in high towers. Short wavelength _____ are produced by magnetron and used for heating and cooking food.

Answer 13

Microwaves

Question 14

It is also known as heat waves. Warm objects emit more _____ than cold objects. It is used in remote controls and digital thermometers widely used today. In addition, it is used by some animals like snakes to detect prey.

Answer 14

Infrared

Question 15

The only electromagnetic waves that can be detected by the human eye: ROYGBIV. When looking at an object, we see the reflected the wavelengths and the others are absorbed. It is also used in fiber optics and imaging tools.

Answer 15

Visible light

Question 16

The sun is the most common source of ______. It causes sunburns, wrinkles, and sometimes skin cancer as over exposures to it alters DNA.
Would its high energy, it is used to sterilize hospital tools. It is also used to detect fake money and forensic evidence.

Answer 16

Ultraviolet rays

Question 17

______ use invisible electromagnetic energy beams to produce images of internal tissues, bones, and organs on film or digital media. Standard ____ are performed for many reasons, including diagnosing tumors or bone injuries.

Answer 17

X-ray

Question 18

_______ are ionizing radiation with the highest energy and frequency. It is useful in cancer radiotherapy, radiograph, and I can act as surgical knives.

Answer 18

Gamma rays