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How Light Spreads Out

How Light Spreads Out. Lesson 4. What’s the deal?. The Sun is one medium size star. The Andromeda Galaxy is a cluster of hundreds of billions of stars*, most are larger than the Sun. Why is the Sun so incredibly much brighter than the whole Andromeda Galaxy?

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How Light Spreads Out

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  1. How Light Spreads Out Lesson 4

  2. What’s the deal? • The Sun is one medium size star. • The Andromeda Galaxy is a cluster of hundreds of billions of stars*, most are larger than the Sun. • Why is the Sun so incredibly much brighter than the whole Andromeda Galaxy? *710,000,000,000 solar masses according to Wikipedia.

  3. What should I put in my data table?

  4. Ideal Data (Don’t Change Yours)

  5. What kind of graph should we use?

  6. Exponential Relationship

  7. Formula: • Area of Illumination = (Distance to Light Source/10)2 • y=(x/10)2 Where y=Area of Illumination and x=Distance to the Light Source

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