====== 1. Seeing Red (Temperature & Radiation) ======
PROBLEM
  * Can the heat properties of materials be **measured** by non-contact interaction?
  * Can the heat properties of materials be **affected** by non-contact interaction?

CURRICULUM LINK
  * Everyday interactions between objects that result from contact and non-contact forces

Create a simple survey to introduce the concept of Infra-red (IR), and familiarise students with and IR thermometer.

If you will be using an Infra-red (IR) thermometer this is a good activity to familiarise students with some of the underlying science.

This will be an extremely useful tool to use for almost every heat experiment described below.

Watch the videos and select at least one practical experiment to perform, then discuss (some example activities/ideas can be found [[:teaching:stem:infrared:home|here]].

=== Example Infra-red Thermometer - User Manual: ===
{{:brainbox:young-engineers:architecture:infrared-thermometer.jpg |Infrared Thermometer}}
  - {{:brainbox:young-engineers:architecture:infrared-thermometer-manual-p1.pdf|Infrared Thermometer Manual Page 1}}
  - {{:brainbox:young-engineers:architecture:infrared-thermometer-manual-p2.pdf|Infrared Thermometer Manual Page 2}}

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++++ Investigating heat using Infra-red (IR) technology (Read more) |
'Nothing tends so much to the advancement of knowledge as the application of a new instrument'. - Sir Humphrey Davy (British chemist)

Infra-red light may feel hot, but [[http://amasci.com/miscon/miscon4.html#heat|Infra-red is NOT a kind of heat]]. This "heat" misconception results from the idea that heat and light radiation are different: 'Heat radiation' is simply a 'colour' of light that is invisible to human beings. The idea of 'Invisible light' may seems bizarre and mysterious, but "invisibility" is caused by limited sensitivity of the human eye. If humans could see all the light in the IR spectrum, we would say things like this: "of course the electric heater makes things hot at a distance, it is intensely bright, and bright light can heat up any surface which absorbs it."

=== Investigating Heat Using Infra-red Technology: ===
Infra-red radiation (IR) is emitted by all objects with a temperature above absolute zero according to the black body radiation law, making it possible (with the right instruments) to see one's environment with or without visible illumination.

The amount of radiation emitted by an object increases with temperature: When viewed through a thermal imaging camera, warm objects stand out well against cooler backgrounds. As a result, infra-red and similar heat-related photography (thermography) is widely used in cameras designed for security, industrial trouble-shooting and health diagnostics.

For example, government, airport and medical staff used thermography to detect suspected swine flu cases and prevent spread of the disease during the 2009 Swine Flu pandemic. Source: https://en.wikipedia.org/wiki/Thermography
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=== Video - Infra-red Radiation (IR) - How it works (6min) ===
{{ youtube>xZVPhWxC9V8?640x360 |Infra-red Radiation- How it works}}
  * IF UNABLE TO ACCESS YOUTUBE, TRY:[[http://viewpure.com/xZVPhWxC9V8|Viewpure]]

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METHOD
  * Use an infra-red light source to heat up an object
  * Use a mobile phone or infra-red camera to view a TVV remote control unit when pressing buttons

QUESTION
  - Is infra-red heat?
  - Why can we feel but not see infra-red?
  - How can we measure temperature using infra-red?
  - What are some of the things that we use every day that also use infra-red - and how do they work?

DISCUSSION
  * Share and compare the results of your investigations/experiments and convince others that your explanation is correct.

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===Video - Infra-red & Radiation Spectrum (5min) ===
{{ youtube>hPJPbbT1TsM?640x360 |Infra-red & The Radiation Spectrum}}
  * IF UNABLE TO ACCESS YOUTUBE, TRY:[[http://viewpure.com/hPJPbbT1TsM|Viewpure]]

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=== Video - Fire, Heat & Light (1.5min) ===
{{ youtube>1pfqIcSydgE?640x360 |Fire, Heat & Light - Minute Physics}}
  * IF UNABLE TO ACCESS YOUTUBE, TRY:[[http://viewpure.com/1pfqIcSydgE|Viewpure]]

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