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Exhibit

Heliostat: Tracks the Sun and focuses it’s light onto target.

Sun

IR Camera

Screen shows IR Image

Exhibit (TBD)

We would like to use the IR Camera with the Heliostat to show that sunlight can produce heat.

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Goals of Evaluation

Do visitors understand the image produced by the IR camera?

(colors correspond to temperatures)

Can visitors use it to understand that light

produces heat?

YES

YES

Use IR Camera in Exhibit

YES

Easily convey color/temperaturecorrespondence?

NO

Don’t Use IR Camera in Exhibit

NO NO

Set Up

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Survey

1. Direct visitors to the two bowls of water and ask: “Can you tell me the difference between these two bowls of water just by looking at the screen”

1a. “What do the colors mean?”

(If incorrect, ask them to feel the water and repeat 1a)

2. Direct visitors to the lamp and ask: “If I shine the lamp on the tabletop, what will the screen show?”

2a.”Why?” “Where is the heat coming from?”

3. After letting them play with the two demos (water and light), ask what they liked best and if they have any suggestions for improvement.

N=39(with groups >100)

54% Female 46% Male

Evaluation Demographics

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Done Saturday morning (11/17) in front of the IR camera

Results

Do people understand the image produced by the IR camera?

(colors correspond to temperatures)

Can visitors use it to understand that light

produces heat?

Easily convey color/temperature correspondence?

YES = 95%

NO = 5 %

Use IR Camera in Exhibit

YES = 87%

Don’t Use IR Camera in Exhibit

NO = 13%

YES=51%NO = 49% After Prompt =55%Before Prompt =45%

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Paint with Light Vs. Play with Water

Paint on Clothes or Easel

Wanted more concentrated ‘brush’

Suggested Hair Dryer, Comparing Bulbs, Friction.

16% 23%

Both61%

Make hand disappear.

Wanted Ice, To Mix Hot and Cold

Give highlights, moustache etc.

Using the IR Camera to…

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Conclusions49% of visitors will understand what they see on the IR Camera without a demonstration or labels.

95% of visitors left understanding the connection between Heat and IR Color

87% of visitors left understanding the connection between LIGHT, Heat and IR Color (Problem: IR Camera scale changes)

Universal (100%) positive response for ‘Hands On’ Interaction