menu
QAmmunity.org
Login
Register
My account
Edit my Profile
Private messages
My favorites
Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question
At what wavelength would its Lyα line be received by a detector above Earth's atmosphere? Express your answer using four significant figures.
asked
Nov 25, 2023
167k
views
0
votes
At what wavelength would its Lyα line be received by a detector above Earth's atmosphere?
Express your answer using four significant figures.
Advanced Placement (AP)
college
Aditya Srivastava
asked
by
Aditya Srivastava
7.8k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
1
vote
A distant galaxy is receding from Earth with a radial velocity of 7000 km/s .
The Lyα line has a wavelength of 121.6 nm. Using the Doppler Effect formula:
λ_obs = (121.6 nm) x (1 + (7000 km/s) / (300000 km/s)) = 124.4 nm
Stephen Kuo
answered
Dec 1, 2023
by
Stephen Kuo
8.2k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
No related questions found
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.
9.5m
questions
12.2m
answers
Other Questions
Several United States Presidents committed military troops to serve in Vietnam in an effort to a. react to violations of United States neutrality. b. support the policy of containment. c. oppose the Chinese
If a nail reacts with oxygen is it a physical property or chemical
Which best describes the topics covered by nonfiction works? a. facts and real events b. historical people and events c. ideas that try to influence readers d. events that never occurred
Leila and Liam are twins and spent their 16th birthday at their favorite amusement park. After riding the biggest and fastest roller coaster in the park, Leila and Liam feel very dizzy and disoriented.
How does the sun create wind?
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search QAmmunity.org