Pickle Light Copyright © Cengage Learning. All rights reserved.

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Pickle Light Copyright © Cengage Learning. All rights reserved

Energy can be gained or lost only in whole number multiples of . A system can transfer energy only in whole quanta (or “packets”). Energy seems to have particulate properties too. Copyright © Cengage Learning. All rights reserved

Electromagnetic radiation is a stream of “particles” called photons. Energy is quantized. Electromagnetic radiation is a stream of “particles” called photons. Planck’s constant = h = 6.626 × 10-34 Js Copyright © Cengage Learning. All rights reserved

The Photoelectric effect To play movie you must be in Slide Show Mode PC Users: Please wait for content to load, then click to play Mac Users: CLICK HERE Copyright © Cengage Learning. All rights reserved

Energy has mass Dual nature of light: Electromagnetic radiation (and all matter) exhibits wave properties and particulate properties. E = mc2 Copyright © Cengage Learning. All rights reserved

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