One of the visible lines of hydrogen has a rest wavelength of 656.285 nm, but it...
One of the visible lines of hydrogen has a rest wavelength of 656.285 nm, but it appears in the spectrum of the star Vega at 656.255 nm. How is Vega moving relative to us( toward or away)? Calculate with what speed. Show work.
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One of the visible lines of hydrogen has a rest wavelength of
656.285 nm, but it...
The H α transition in hydrogen has a rest wavelength of 656.3 nm, coming from electrons...
The H α transition in hydrogen has a rest wavelength of 656.3 nm, coming from electrons moving between the n=2 and n=3 orbitals. You observe a star in which this transition shows a wavelength of 650 nm. How fast is the star moving? Is it moving toward you or away from you. Calculate the same for a galaxy where the wavelength of H α is 1100 nm.
DopplerShift:TheHb(hydrogenbeta)line,whichisstronginthespectraof moderately hot stars, has a wavelength of 486.133 nm in the laboratory (i.e., at rest...
DopplerShift:TheHb(hydrogenbeta)line,whichisstronginthespectraof moderately hot stars, has a wavelength of 486.133 nm in the laboratory (i.e., at rest with respect to the observer). What wavelength (nm) would we observe the Hb line on Earth if it were emitted by a star: a) moving at a speed of 200 km/s toward Earth? b) moving at a speed of 300 km/s away from Earth?
(a) At what wavelength will we observe a spectral line emitted at 500 nm by a...
(a) At what wavelength will we observe a spectral line emitted at 500 nm by a star (b) At what wavelength will we observe the Ca II line (with rest wavelength 397.0 (c) A cloud of neutral hydrogen (HI) emits the so-called "21-cm line" (actually moving toward us at 100 km/s? nm) emitted by a galaxy receding at 60,000 km/s? 21.11 cm, at rest frequency 1420.2 MHz) while moving away at 200 km/s. At what frequency will we observe this...
Calculate the positions of the lines in the hydrogen atom's line spectrum in the visible light...
Calculate the positions of the lines in the hydrogen atom's line spectrum in the visible light wavelength range 400 nm to 700 nm. (Give your answer from the highest wavelength to the lowest with three significant digits.)
White light is made of all colours of the visible spectrum which has a wavelength range...
White light is made of all colours of the visible spectrum which
has a wavelength range of approximately 380 – 750 nm (violet to
red). White light is incident on a diffraction grating that has 90
lines/mm. What is the width of the 1st order rainbow
band that appears in the diffraction pattern if the screen is 1.60
m away? Express your answer in mm and round to 2 decimal
places.
Question 7 (2 points) White light is made of...
A star has an emission line at a wavelength of 666.80 nm. The rest wavelength of the...
A star has an emission line at a wavelength of 666.80 nm. The rest wavelength of the line is 656.3 nm. What is the velocity of the star? Hint: How does the velocity of a star depend on its observed wavelength? What is the equation for Doppler shift? The speed of light is 3.0 × 105 km/s.
A red emission lone from a star has a wavelength of 650 nm. A) What is...
A red emission lone from a star has a wavelength of
650 nm.
A) What is the corresponding frequency?
B How much energy does each photon at this wavelength
carry?
Back HW 2.pdf SCIE 223: Astronomy Written Homework 2 due Thursday, November 21, 2019 A red emission line from a star has a wavelength of 650 nm. 1) What is the corresponding frequency? Show your work a. b. How much energy does each photon at this wavelength carry? Show your...
6 1. A red photon has a wavelength of 660 nm. How fast must a star...
6
1. A red photon has a wavelength of 660 nm. How fast must a star be moving toward the Earth for a red photon emitted by the star to change its color to an orange photon of wavelength 620 nm? You may, if you wish, express your answer either in m/s or in terms of the speed of light c (e.g., "0.021c"). [You'll need to do a little bit of algebra. Keep in mind that, by convention, the velocity...
White light is made of all colours of the visible spectrum which has a wavelength range...
White light is made of all colours of the visible spectrum which has a wavelength range of approximately 380 - 750 nm (violet to red). White light is incident on a diffraction grating that has 110 lines/mm. What is the width of the 1st order rainbow band that appears in the diffraction pattern if the screen is 1.50 m away? Express your answer in mm and round to 2 decimal places. Your Answer: Answer
The hydrogen spectrum shows 4 lines in the region visible spectral (this series is called the...
The hydrogen spectrum shows 4 lines in the region visible spectral (this series is called the Balmer series: Hα (red): λ= 656.3 nm, Hβ (blue-green): λ = 481.1 nm, Hγ (purple): λ = 434.1 nm, and Hλ (purple): λ = 410.2 nm). Another series in the hydrogen spectrum is the Lyman series. Determine the wavelength of the second line of the Lyman series in m and nm (give two digits after the decimal point).
(a) At what wavelength will we observe a spectral line emitted at 500 nm by a star (b) At what wavelength will we observe the Ca II line (with rest wavelength 397.0 (c) A cloud of neutral hydrogen (HI) emits the so-called "21-cm line" (actually moving toward us at 100 km/s? nm) emitted by a galaxy receding at 60,000 km/s? 21.11 cm, at rest frequency 1420.2 MHz) while moving away at 200 km/s. At what frequency will we observe this...
White light is made of all colours of the visible spectrum which
has a wavelength range of approximately 380 – 750 nm (violet to
red). White light is incident on a diffraction grating that has 90
lines/mm. What is the width of the 1st order rainbow
band that appears in the diffraction pattern if the screen is 1.60
m away? Express your answer in mm and round to 2 decimal
places.
Question 7 (2 points) White light is made of...
A red emission lone from a star has a wavelength of
650 nm.
A) What is the corresponding frequency?
B How much energy does each photon at this wavelength
carry?
Back HW 2.pdf SCIE 223: Astronomy Written Homework 2 due Thursday, November 21, 2019 A red emission line from a star has a wavelength of 650 nm. 1) What is the corresponding frequency? Show your work a. b. How much energy does each photon at this wavelength carry? Show your...
6
1. A red photon has a wavelength of 660 nm. How fast must a star be moving toward the Earth for a red photon emitted by the star to change its color to an orange photon of wavelength 620 nm? You may, if you wish, express your answer either in m/s or in terms of the speed of light c (e.g., "0.021c"). [You'll need to do a little bit of algebra. Keep in mind that, by convention, the velocity...
White light is made of all colours of the visible spectrum which has a wavelength range of approximately 380 - 750 nm (violet to red). White light is incident on a diffraction grating that has 110 lines/mm. What is the width of the 1st order rainbow band that appears in the diffraction pattern if the screen is 1.50 m away? Express your answer in mm and round to 2 decimal places. Your Answer: Answer
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