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ISBN: 9781938168185 2032

## Solution for problem 135 Chapter 2

University Physics, Volume 3 | 17th Edition

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University Physics, Volume 3 | 17th Edition

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Problem 135

Find the focal length of a thin plano-convex lens. The front surface of this lens is flat, and the rear surface has a radius of curvature of $$R_{2}=-35 \mathrm{~cm}$$. Assume that the index of

refraction of the lens is 1.5.

Text Transcription:

R_2=-35 cm

Step-by-Step Solution:
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Week 8 ● Notes: Ch 10 cont. ○ Brightness ■ Luminosity ● Expressed in terms of solar luminosity ○ 1L ○ Most luminous stars are 10ˆ6 L ○ Least luminous stars are 10ˆ- 4L ○ Low luminosity stars are more common ○ What is matter ■ Atomic terminology ● Atomic number ○ Number of protons in nucleus ● Atomic mass number ○ Number of protons plus numbers of neutrons ■ Example ● Hydrogen ○ ˆ1 H ■ Atomic number = 1 ■ Atomic mass number = 1 ● Isotope ○ Same number of protons but different number of neutrons ● Molecules ○ Consist of two or more atoms ○ Composition ■ Energies ● Electrons can only have certain energies ○ Some not allowed ● Each type of atom has a unique set of energies ○ Typically illustrated with an energy level diagram ● Energy state ○ Lowest energy = ground state ○ Energy above ground state = excited states ○ Atoms can go from 1 level to another, but can not be in between le

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