[Answered] In the standard model, about when after the Big Bang did the universe become transparent to ...

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Author Question: In the standard model, about when after the Big Bang did the universe become transparent to ... (Read 36 times)

KimWrice

Hero Member
Posts: 579

on: Jul 29, 2018

In the standard model, about when after the Big Bang did the universe become transparent to radiation?

A)

10-43 s
B)

10-35 s
C)

103 s
D)

3 105 y
E)

3 106 y

Question 2

According to the selection rule, when a photon is emitted or absorbed, transitions can only occur between state with values of that differ by

A)

five units.
B)

four units.
C)

three units.
D)

two units.
E)

one unit.

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Cheesycrackers

Sr. Member
Posts: 333

Reply #1 on: Jul 29, 2018

Answer to Question 1

D

Answer to Question 2

E

KimWrice

Hero Member
Posts: 579

Reply #2 on: Jul 29, 2018

Thanks

Cheesycrackers

Sr. Member
Posts: 333

Reply #3 on: Jul 29, 2018

Welcome

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