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Physics

Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 1: Laser Physics, Population Inversion and the Helium-Neon Laser — Picture questions (exam style)

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1.
A 2.00 mW laser beam has diameter 1.00 mm. Find its intensity.
A 2.00 mW laser beam has diameter 1.00 mm. Find its intensity.
2550 W m−2
2000 W m−2
637 W m−2
8.00 W m−2
2.
A 10.0 mW laser beam has diameter 4.00 mm. Find its intensity.
A 10.0 mW laser beam has diameter 4.00 mm. Find its intensity.
625 W m−2
10.0 W m−2
199 W m−2
796 W m−2
3.
A 4.00 mW laser beam has diameter 4.00 mm. Find its intensity.
A 4.00 mW laser beam has diameter 4.00 mm. Find its intensity.
79.6 W m−2
318 W m−2
4.00 W m−2
250 W m−2
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