Question

What three characteristics may you observe as you vary the type of EM waves? (Start from the top.)

1. _______ measured in _______

2. _______ measured in _______

3. _______ measured in _______ which is equivalent to 1.6 X 10^-19 Joules.

Good to know.

Electromagnetic waves occur in a continous spectrum based on their wavelength.

EM waves of a particular range of wavelengths are given names such as infrared and visible.

Unlike mechanical waves such as sound or earthquake waves, EM waves can travel through empty space.

EM waves are used for communication with satellites and for observing the Earth from space.

Sunlight is made up of EM waves

What are the differences between the different types of electromagnetic radiation?

1. _______

2. _______

3. _______

Which has a longer wavelength - visible or infrared radiation? _______

Which contains more energy - visible or infrared radiation? _______

Which has a higher frequency - visible or infrared radiation? _______

About how fast do all EM waves move? _______

Do EM waves transmit energy or mass? _______

Part C

Tour of EMS

“What Are Electromagnetic Waves?”

EMR is the abbreviation for electromagnetic radiation which is described as a spectrum because it consists of a wide variety of waves which vary in wavelength, frequency and energy. But all forms travel at the speed of light (usually represented as “c”) which is _______ kilometers per second in a vacuum.

“Radio”

How are radio waves generated? _______

They are divided into _______ .

List a variety of their uses. _______

“Microwave”

Creating microwaves is due to the invention of the _______ which is a_______ capable of generating power at microwave frequencies.

Radar which stands for _______ , takes advantage of microwaves’ short wavelengths to isolate objects.

Compare and contrast radio waves and microwaves. _______

What is heat? _______

How does a microwave oven warm food? _______

“Infrared”

This part of the spectrum is also called _______

This type of radiation comes from _______.

Can you “see” infrared radiation? _______

If you set in the sun and perspire it is because of _______ .

How is infrared radiation used in communication? _______

“Visible Light”

Is the portion of the EMR spectrum to which the human eye neurologically responds.

How hot must a light bulb filament be to omit white light? _______

_______ are the building blocks of light.

“Ultraviolet Light”

If you sit in the sun and get burnt it is due to _______ .

List some uses of ultraviolet light. _______

“X-rays”

Was discovered by_______ in _______ .

Why are they called X-rays? _______

List some uses of x-rays. _______

“Gamma Rays>

List two sources of gamma radiation on Earth. _______

List some uses of gamma rays. _______

Answer 1

What three characteristics may you observe as you vary the type of EM waves? (Start from the top.)

1. _wavelength______ measured in __meter_____

2. ___frequency____ measured in ___hertz____

3. ___energy____ measured in _electronvolt______ which is equivalent to 1.6 X 10^-19 Joules.

Good to know.

Electromagnetic waves occur in a continous spectrum based on their wavelength.

EM waves of a particular range of wavelengths are given names such as infrared and visible.

Unlike mechanical waves such as sound or earthquake waves, EM waves can travel through empty space.

EM waves are used for communication with satellites and for observing the Earth from space.

Sunlight is made up of EM waves

What are the differences between the different types of electromagnetic radiation?

1. ____wavelength___

2. _____frequency__

3. ______energy_

Which has a longer wavelength - visible or infrared radiation? __infrared_____

Which contains more energy - visible or infrared radiation? __visible_____

Which has a higher frequency - visible or infrared radiation? ___visible____

About how fast do all EM waves move?__3*10^8 meter per second in vacuum_____

Do EM waves transmit energy or mass? ___energy____

Part C

Tour of EMS

“What Are Electromagnetic Waves?”

EMR is the abbreviation for electromagnetic radiation which is described as a spectrum because it consists of a wide variety of waves which vary in wavelength, frequency and energy. But all forms travel at the speed of light (usually represented as “c”) which is __300000_____ kilometers per second in a vacuum.

“Radio”

How are radio waves generated? _they are generated naturally by astronomical object and artificially by transmitter by vibration of atoms______

They are divided into _______ .

List a variety of their uses. ____they are use for broadcast radio and television,navigation and air traffic control,mobiles and remote control toys ___

“Microwave”

Creating microwaves is due to the invention of the _radar_____ which is a___detector____ capable of generating power at microwave frequencies.

Radar which stands for __radio detection and ranging_____ , takes advantage of microwaves’ short wavelengths to isolate objects.

Compare and contrast radio waves and microwaves.1. radio waves have longer wavelegth as compare to microwave

2. radio wave have less frequency than microwave

3 radio waves are less energetic than the microwave_______

What is heat? __heat is actually a form of energy which is transferred between two objects_____

How does a microwave oven warm food? __oven generate the microwave which strikes the food put in the oven. this microwaves makes atom of food oscillates quickly due to which food start warming_____

“Infrared”

This part of the spectrum is also called __below red light_____

This type of radiation comes from __hot objects_____.

Can you “see” infrared radiation? ___no____

If you set in the sun and perspire it is because of ___heat transferred by infrared wave____ .

How is infrared radiation used in communication? _infrared pulses are shoot by the remote(LED) which can be detected by the infrared detector  and convert it to electrical signal in same way it uses to communication with sattelite______

“Visible Light”

Is the portion of the EMR spectrum to which the human eye neurologically responds.

How hot must a light bulb filament be to omit white light? ___greater than 5*10^-19 j____

__photons_____ are the building blocks of light.

“Ultraviolet Light”

If you sit in the sun and get burnt it is due to ___energy of ultraviolet____ .

List some uses of ultraviolet light. __sterallise surgical equipment to kill bacteria and security marker pen_____

“X-rays”

Was discovered by__Wilhelm Roentgen_____ in ___1895____ .

Why are they called X-rays? __because it was first unknows what it is and it pass through many materials where from visible light cant pass_____

List some uses of x-rays. __to cure cancer cells and to check broken bones_____

“Gamma Rays>

List two sources of gamma radiation on Earth. __nuclear reactions , radioactive elements and cosmic rays_____

List some uses of gamma rays. ___to kill cancer cell, for the different nuclear reaction,to produce x ray____