Presentation is loading. Please wait.

Presentation is loading. Please wait.

Radiation Learning Objectives:

Published byLeslie Craig Modified over 6 years ago

Similar presentations

Presentation on theme: "Radiation Learning Objectives:"— Presentation transcript:

1 Radiation Learning Objectives:
Recall that all hot objects give off infrared radiation. Recall that infrared radiation is a type of electromagnetic wave (form of light). Describe materials that are good reflectors, absorbers, and emitters of radiation. Explain why radiation is the only form of heat transfer that can happen through a vacuum.

2 Infrared Radiation All hot objects transfer thermal energy by infrared radiation (IR). The hotter an object is, the more infrared radiation it gives off. Infrared radiation is often shortened to radiation.

3 Radiation Can Travel In Space
Radiation is the only form of heat transfer that can happen in a vacuum (area with no particles) such as in space. This is why the Sun’s infrared radiation can reach us on Earth. Conduction and convection both involve the movement of particles and there are no particles in space!

4 Which shirt will make you feel hotter on a sunny day? Why?

5 Radiation can be Reflected or Absorbed
What kind of material reflect radiation? Light coloured Shiny What kind of materials absorb radiation? Dark coloured Matte (not shiny)

6 Why is the astronaut’s suit white?

7 NO YES YES YES NO NO YES quickly slowly Conduction Convection
Radiation How it works Does it pass heat through solids? Does it pass heat through liquids and gases? Does it pass heat through a vacuum (empty space)? Infrared radiation is given off by all hot objects as a light wave Particles bump into each other and pass heat energy Hot fluids rise and cold fluids sink and transfer heat energy NO quickly YES slowly YES YES NO NO YES

8 comparison

9 Vacuum Flask Thermos

10 Vacuum Flask Thermos

Download ppt "Radiation Learning Objectives:"

Similar presentations

Transferring Thermal Energy

Transferring Thermal Energy
Heat can travel by Convection A hot fluid expands, so is less dense, so rises. Cold fluid takes its place. A convection current can be formed.

Heat can travel by Convection A hot fluid expands, so is less dense, so rises. Cold fluid takes its place. A convection current can be formed.
Chapter 2 Weather Factors

Chapter 2 Weather Factors
Chapter 2 Section 1  The sun provides nearly all of the energy which powers the atmosphere.  That energy comes to us in the form of electromagnetic.

Chapter 2 Section 1  The sun provides nearly all of the energy which powers the atmosphere.  That energy comes to us in the form of electromagnetic.
The transfer of energy by heating processes

The transfer of energy by heating processes
By Ollie Docherty and Lauren Moore. Heat energy can move through a substance by conduction. Metals are good conductors of heat, but non-metals and gases.

By Ollie Docherty and Lauren Moore. Heat energy can move through a substance by conduction. Metals are good conductors of heat, but non-metals and gases.
How ‘Heat’ Moves  Define “ Heat ”: Heat is the movement of thermal energy from a substance at a higher temperature to another substance at a lower temperature.

How ‘Heat’ Moves  Define “ Heat ”: Heat is the movement of thermal energy from a substance at a higher temperature to another substance at a lower temperature.
Conduction, Convection, and Radiation. Heat Energy Energy is what makes things happen. All materials are made of tiny particles called molecules. Molecules.

Conduction, Convection, and Radiation. Heat Energy Energy is what makes things happen. All materials are made of tiny particles called molecules. Molecules.
Heat Transfer Conduction, Convection, and Radiation.

Heat Transfer Conduction, Convection, and Radiation.
Chapter 2 Weather Factors Section 2 Heat Transfer.

Chapter 2 Weather Factors Section 2 Heat Transfer.
Solar Energy Heat and Light. Energy Can take many different forms –____________ –Heat –____________.

Solar Energy Heat and Light. Energy Can take many different forms –____________ –Heat –____________.
Heat Transfer What do you know about heat transfer?

Heat Transfer What do you know about heat transfer?
180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: List & describe the three types of heat transfer.

Seconds Left: List & describe the three types of heat transfer.
Conduction The transfer of energy as heat between particles collide within a substance or between two objects in contact Two objects of unequal temperature.

Conduction The transfer of energy as heat between particles collide within a substance or between two objects in contact Two objects of unequal temperature.
HEAT TRANSFER Conduction, Convection and Radiation.

HEAT TRANSFER Conduction, Convection and Radiation.
6.2 Transferring Thermal Energy. Conduction Transfer of thermal energy (TE) by collisions between the particles in matter Transfer of thermal energy (TE)

6.2 Transferring Thermal Energy. Conduction Transfer of thermal energy (TE) by collisions between the particles in matter Transfer of thermal energy (TE)
Do Now: Based on the notes from last week, what is the difference between temperature and heat?

Do Now: Based on the notes from last week, what is the difference between temperature and heat?
Conduction, Convection, Radiation. Conduction Transfer of heat by direct contact. Heat flows from the warmer object to the colder object. Solids are better.

Conduction, Convection, Radiation. Conduction Transfer of heat by direct contact. Heat flows from the warmer object to the colder object. Solids are better.
Methods of Heat Transfer. List as many Methods of Heat Transfer.

Methods of Heat Transfer. List as many Methods of Heat Transfer.
21/03/2016 Heat and Temperature. 21/03/2016 Heat and Temperature This cup of coffee will ____ ____ because it is _____ ____ heat energy into the surroundings.

21/03/2016 Heat and Temperature. 21/03/2016 Heat and Temperature This cup of coffee will ____ ____ because it is _____ ____ heat energy into the surroundings.

Similar presentations

Ads by Google