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Q. 54

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 903

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Short Answer

For a science project, you would like to horizontally suspend an by inch sheet of black paper in a vertical beam of light whose dimensions exactly match the paper. If the mass of the sheet is , what light intensity will you need

Needed light intensity is .

See the step by step solution

Step by Step Solution

Step 1: Calculation for Area and force

Area is,

Force is,

Step 2: Calculation for power

If an item absorbs energy over a time interval, the momentum will vary as follows:

Step 3: Calculation for intensity

Intensity is,

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