Electromagnetic Radiation

Question 1

How are em waves propagated

Answer 1

Accelerating charges induced change in electrical and magnetic fields at a right angle to the direction of movement

Question 2

What are Wave properties that electromagnetic radiation has

Answer 2

Reflection refraction and interference

Question 3

Name properties of electromagnetic waves

Answer 3

Move at a consent speed in a vacuum
do not need a medium for propagation
have all the properties of waves
Refraction interference and reflection
have particle properties which means they can have interactions with electron
em waves are transverse waves originate from accelerating electric charges

Question 4

List the different types of electromagnetic radiation in order of increasing penetrating ability

Answer 4

Radio waves 10^3
microwaves 10^-2
infrared rays 10^-5
visible light 10^-6
ultraviolet rays 10^-8
x-rays 10^10
gamma rays 10^-12

Question 5

Name one use and one disadvantage of radio waves

Answer 5

One use of radio waves is radio and television broadcast and one disadvantages is noise pollution because of the loudness of radios and TVs

Question 6

Name one use and one disadvantage of microwaves

Answer 6

One use is cell phone connections and one disadvantage is the use of cell phones can be addicting and lead to lack of productivity

Question 7

Name one use of infraid light and one disadvantages of it

Answer 7

One use is in the remote control of a TV in one disadvantage is that it is used by Poachers and soldiers for tracking at night

Question 8

Name one use of visible

Answer 8

Visible light is used for photosynthesis in plants

Question 9

What is one use of ultraviolet light and one disadvantage of it

Answer 9

It can be used to sterilize food and appliances and too much exposure I can cause damage to eyes and skin and cause cancer

Question 10

Name one use of X-rays and one in disadvantage of them

Answer 10

X-rays are used for CT scans and for medical images because they penetrate of tissue but not Bone and one disadvantage is that too much exposure can lead to cancer and skin damage

Question 11

Name one use of gamma rays and one disadvantage

Answer 11

Calories can be used for the radiation of cancer and killing mutated cells and one disadvantage is that families can cause damage resulting in the death of people animals and plants

Question 12

What are the conversions for for them types of meters

Answer 12

1 mm is equal to 1 * 10 ^ -3 1 micrometer is equal to 1 * 10 ^ -6 1 nanometer is equal to 1 * 10 ^ -9 1:00 p.m. is equal to 1 * 10 ^ - 12

Question 13

What are the dangers of Gamma rays,x rays and uv rays

Answer 13

Too much exposure can cause

Question 14

What is a photon

Answer 14

A packet of energy found in light