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Physics

Chapter 1 - Electric Current, Ohms Law and Kirchhoffs Laws

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Chapter 2 - Magnetic Effects of Electric Current and Measuring Instruments

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Chapter 3 - Electromagnetic Induction and AC Dynamo and Transformer

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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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  • Questions count: 3
  • Passing grade: 60%
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1.
A 4.00 mW laser beam is fully absorbed by a surface. Find the force on it.
A 4.00 mW laser beam is fully absorbed by a surface. Find the force on it.
1.33×10−11 N
2.67×10−11 N
2.71×107 N
1.20×106 N
2.
A 0.500 mW laser beam is fully absorbed by a surface. Find the force on it.
A 0.500 mW laser beam is fully absorbed by a surface. Find the force on it.
1.50×105 N
1.67×10−12 N
4.31×106 N
3.33×10−12 N
3.
A 20.0 mW laser beam is fully absorbed by a surface. Find the force on it.
A 20.0 mW laser beam is fully absorbed by a surface. Find the force on it.
6.00×106 N
6.67×10−11 N
1.33×10−10 N
3.57×108 N
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