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Q. 64

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 1116

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Short Answer

Very large, hot stars—much hotter than our sun—can be identified by the way in which He+ ions in their atmosphere absorb light. What are the three longest wavelengths, in nm, in the Balmer series of He+?

Atmospheric gases absorb light in a variety of spectral regions, most commonly in broad bands.

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Step by Step Solution

Step 1: Given information

The Balmer series is a set of quantum transitions from the nth level (n>2) to the m=2 state.

We have (38.41) from the book's eq.

With Z=2 for and we have the transition wavelenghts from (38.40)

Therefore,

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