You are a scout doing a merit badge on fire starting and have a magnifying glass with a focal length 2 3 cm The Sun is 150 million km away How close to the tinder (fire starter) should you hold the magnifying glass to have the best chance of starting a fire (You want to concentrate the sunlight) Y...

To calculate how close to the tinder you should hold the magnifying glass to have the be ...

You are a scout doing a merit badge on fire starting and have a magnifying glass...

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Physics

ISBN: 978-0077339685

2nd edition

Authors: Alan Giambattista, Betty Richardson, Robert Richardson

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You are a scout doing a merit badge on fire starting and have a magnifying glass...

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