21ST CENT.AST.W/WKBK+SMARTWORK >BI<
6th Edition
ISBN: 9780309341523
Author: Kay
Publisher: NORTON
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Chapter 5, Problem 22QP
To determine
Describe the importance of bright and dark lines that indicate about the atoms responsible for the spectral lines.
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Choose the correct statements concerning the electromagnetic spectrum given off by stars. (Give ALL correct answers, i.e., B, AC, BCD...)
A) Blue photons are more energetic than red photons.
B) A hot star will be more red in color than a cooler star.
C) All stars are the same color as our Sun.
D) Hot stars are much brighter than cool stars of the same size and distance from the Earth.
E) If we see a blue star and a red star in a nearby star cluster, we know the red star is hotter.
F) Blue photons (blue light) have a longer wavelength than red photons.
3.
Diagram "H" shows the absorption spectrum of
hydrogen, while "X", "Y" and "Z" are part of the
absorption spectra from 3 different stars.
blue
yellow
red
H
Star X
Star Y
Star Z
State how each spectrum differs from "H" and what
that reveals about the motion of the stars X, Y and Z.
What type of spectrum is observed in the light from the sun and other stars?
a continuous spectrum consisting of all colors.
an emission spectrum.
an absorption spectrum consisting of dark lines in a continuous bright background.
an atomic spectrum of hydrogen.
Chapter 5 Solutions
21ST CENT.AST.W/WKBK+SMARTWORK >BI<
Ch. 5.1 - Prob. 5.1ACYUCh. 5.1 - Prob. 5.1BCYUCh. 5.2 - Prob. 5.2CYUCh. 5.3 - Prob. 5.3CYUCh. 5.4 - Prob. 5.4CYUCh. 5.5 - Prob. 5.5CYUCh. 5 - Prob. 1QPCh. 5 - Prob. 2QPCh. 5 - Prob. 3QPCh. 5 - Prob. 4QP
Ch. 5 - Prob. 5QPCh. 5 - Prob. 6QPCh. 5 - Prob. 7QPCh. 5 - Prob. 8QPCh. 5 - Prob. 9QPCh. 5 - Prob. 10QPCh. 5 - Prob. 11QPCh. 5 - Prob. 12QPCh. 5 - Prob. 13QPCh. 5 - Prob. 14QPCh. 5 - Prob. 15QPCh. 5 - Prob. 16QPCh. 5 - Prob. 17QPCh. 5 - Prob. 18QPCh. 5 - Prob. 19QPCh. 5 - Prob. 20QPCh. 5 - Prob. 21QPCh. 5 - Prob. 22QPCh. 5 - Prob. 23QPCh. 5 - Prob. 24QPCh. 5 - Prob. 25QPCh. 5 - Prob. 26QPCh. 5 - Prob. 27QPCh. 5 - Prob. 28QPCh. 5 - Prob. 29QPCh. 5 - Prob. 30QPCh. 5 - Prob. 31QPCh. 5 - Prob. 32QPCh. 5 - Prob. 33QPCh. 5 - Prob. 34QPCh. 5 - Prob. 35QPCh. 5 - Prob. 36QPCh. 5 - Prob. 37QPCh. 5 - Prob. 38QPCh. 5 - Prob. 39QPCh. 5 - Prob. 40QPCh. 5 - Prob. 41QPCh. 5 - Prob. 42QPCh. 5 - Prob. 43QPCh. 5 - Prob. 44QPCh. 5 - Prob. 45QP
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- Star X has lines of ionized helium in its spectrum, and star Y has bands of titanium oxide. Which is hotter? Why? The spectrum of star Z shows lines of ionized helium and also molecular bands of titanium oxide. What is strange about this spectrum? Can you suggest an explanation?arrow_forwardExplain what Joseph Fraunhofer discovered about stellar spectra.arrow_forwardSuppose you're experimenting with the spectrum produced by heated hydrogen gas. If you double the quantity of hydrogen and examine the resulting spectral lines, what is most likely to have changed? Group of answer choices The number of lines seen. The frequencies of the lines. The intensity of the lines. The pattern made by the lines. The wavelengths of the lines.arrow_forward
- State whether it is true that “the A spectrum is AM0 and the B spectrum is AM1.5”. Explain why B is weaker than A across the whole wavelength range. Show how you estimate the surface temperature of the Sun using the given spectrum.arrow_forwardMatch the letter located in the digital spectra above (in the second picture) with the correct statement about each spectrum.1) Lines of neutral helium. Hydrogen lines moderately strong2) Hydrogen lines very strong and dominate the spectrum.3) Lines of ionized helium; most lines are weak because the star is so hot most electrons are removed from atoms and there are few atoms making transitions.4) Lines of neutral elements strongest. Singly ionized calcium lines are weaker, but still present.5) Lines of easily ionized elements like singly ionized calcium are strong; hydrogen lines are weak because it is not hot enough for hydrogen to be in the n=2 state.6) Singly ionized Calcium (393.0 nm) and a hydrogen line (434.0 nm) are about equal strength.7) Many lines of neutral elements and molecular states.arrow_forward2arrow_forward
- Which of the following statements are TRUE about the Sun's spectrum, which is shown in this image? Brightness 2.5 3.5 0 Jay 200 Sun's Spectrum vs. Thermal Radiator of a single temperature T = 5777 K peak spectrum of Sun spectrum of T=5777 K blackbody emission spectrum (continuum) absorption lines 400 600 800 1000 1200 1400 1600 Wavelength (nanometres) 1800 2000 The spectrum shows that the Sun emits light of all colors equally, which is why we see it as white. The spectrum shows the presence of many sunspots. The peaks and valleys in the black line reveal the chemical composition of the Sun. The spectrum shows absorption features (spectral lines). The spectrum represents a perfect blackbody.arrow_forwardDifferentiate between emission spectra and absorption spectra. Write five-five points of each spectra to discuss the difference.arrow_forwardQuestion 9 Look at the three spectra of stars in the picture above. The top one, for instance, is the darkest at the blue end and the brightest at the red end. Using such considerations, list the top, middle and bottom spectra in order of temperature, highest to lowest.arrow_forward
- A blue-hot star is about twice as hot as a red-hot star. But the temperatures of the gases in advertising signs are about the same, whether they emit red or blue light. What is your explanation?arrow_forwardWhy don’t we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K? a. There is no hydrogen in stars this cool. b. The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy. c. These stars are so cool that nearly all of the hydrogen atoms are in the ground state. d. Stars of this temperature are too cool to produce an absorption spectrum. e. Stars of this temperature are too hot to produce an absorption spectrum.arrow_forwardCalculate the wavelength of a photon having an energy of 5.89 x 10^11 J of energy. E = hc/λ You must show a correct numerical setup and your answer must include the correct mathematical unit.arrow_forward
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