The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0 × 10 6 ly .

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Answer 1

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Chapter 44, Problem 25P

(a)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×106 ly.

(b)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×107 ly.

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40 Because the apparent recessional speeds of galaxies and quasars at great distances are close to the speed of light, the rela- tivistic Doppler shift formula (Eq. 37-31) must be used. The shift is reported as fractional red shift z = AAg. (a) Show that, in terms of z, the recessional speed parameter B = v/c is given by z? + 2z z? + 2z + 2 (b) A quasar detected in 1987 has z = 4.43. Calculate its speed pa- rameter. (c) Find the distance to the quasar, assuming that в- Hubble's law is valid to these distances.

*39 Will the universe continue to expand forever? To attack this question, assume that the theory of dark energy is in error and that the recessional speed v of a galaxy a distance r from us is determined only by the gravitational interaction of the matter that lies inside a sphere of radius r centered on us. If the total mass inside this sphere is M, the escape speed v, from the sphere is v. = V2GMIT (Eq. 13-28). (a) Show that to prevent unlimited expansion, the aver- age density p inside the sphere must be at least equal to ЗН 87G (b) Evaluate this "critical density" numerically; express your an- swer in terms of hydrogen atoms per cubic meter. Measurements of the actual density are difficult and are complicated by the pres- ence of dark matter.

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Answer 2

Question

Chapter 44, Problem 25P

(a)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×106 ly.

(b)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×107 ly.

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Answer 3

Question

Chapter 44, Problem 25P

(a)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×106 ly.

(b)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×107 ly.

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Answer 4

Question

Chapter 44, Problem 25P

(a)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×106 ly.

(b)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×107 ly.

Expert Solution & Answer

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Answer 5

Chapter 44, Problem 25P

(a)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×106 ly.

(b)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×107 ly.

Answer 6

Chapter 44, Problem 25P

(a)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×106 ly.

Answer 7

Chapter 44, Problem 25P

(a)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×106 ly.

Answer 8

(b)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×107 ly.

Answer 9

(b)

To determine

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×107 ly.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 44.1 - Suppose we could place a huge mirror 1 light-year...Ch. 44.2 - Prob. 1BE Ch. 44.4 - What is the Schwarzschild radius for an object...Ch. 44.4 - A black hole has radius R. Its mass is...Ch. 44.9 - Prob. 1EE Ch. 44 - The Milky Way was once thought to be murky or...Ch. 44 - Prob. 2Q Ch. 44 - Prob. 3Q Ch. 44 - Prob. 4Q Ch. 44 - Prob. 5Q

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0 × 10 6 ly .

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The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×106 ly.

The wavelength shift for the 656 nm line in the Balmer series of hydrogen emitted from a galaxy whose distance from us is 7.0×107 ly.

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