The Blue hydrogen line has a frequency of 6.90 x 1014 Hz. What will be the observed wavelength of the blue line of a galaxy that is moving away from Earth at 0.4c?
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- Imagine an alternate universe where the value of the Planck constant is 6.62607x10−36J·s. In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Which objects would act like everyday objects, and be adequately described by classical mechanics? A buckyball with a mass of 1.2 x 10-21 g, 0.7 nm wide, moving at 11. m/s. An iceberg with a mass of 2.2 x 108 kg, 70. m wide, moving at 1.43 km/h. A mosquito with a mass of 1.1 mg, 8.2 mm long, moving at 1.2 m/s A bacterium with a mass of 5.0 pg, 9.0 µm long, moving at 1.00 µm/s.8. Milky Way The Sun is a star in the Milky Way galaxy. When viewed from the side, the galaxy looks like a disk that is approximately 100,000 light-years in diameter (a light-year is the distance light travels in one year) and about 1000 light-years thick (Figure P25.8). What is the diameter and thickness of the Milky Way in meters? In kilometers? In miles? Figure P25.8 Galactic Longitude 75.000 ittarius Sagitt Arm Onan Perseus Arm Arm 15,000 30.000 180° Scutum-Ce 270° Sun and solar system's location in the Milky WayImagine our solar system is moving in the Milky Way toward a group of three stars. Star A is a blue star that is slightly closer to us than the other two. Star B is a red star that is farthest away from us. Star C is a yellow star that is halfway between Stars A and B. Which of these three stars, if any, will give off light that appears to be redshifted? А. А В. В O C. C D. All three stars will appear to be redshifted. E. None of these stars will appear to be redshifted.
- The wavelength of the peak of the blackbody distribution was found to follow Wein’s Displacement Law. Calculate the peak wavelength of a bluish-white star that radiates at temperature 20000 K. a) 145 nm b) 100 nm c) 114 nm d) 155 nmWhat is the significance of the color of a star? O The color tells how far away the star is O The color reveals the temperature (and often the size) of the star O The color is not scientifically important O The color tells the relative motion of the star to Earth (toward/away)The red-shift of a galaxy observed by us corresponds to a speed of 50000 km/s. How far is the galaxy from us approximately? A. 700 Mpc B. 70 Mpc C. 7 Mpc D. 7 Gpc Is the answer A? Thank you!
- According to Einstein's General Theory of Relativity, the attraction between all pieces of___________ in the universe is caused by the ______________ of ______________. Group of answer choices matter, curvature, spacetime spacetime, gravity, matter gravity, curvature, matterRemember the wave equation is v = lambda - f For electromagnetic waves traveling in a vacuum, they all travel at the speed of light c = 2.998 * 10 ^ 8 * m / s . An ultraviolet wave from the Sun traveling at the speed of light has a wavelength of 3 * 10 ^ - 8 * m . Calculate the frequency of this wave 8.85 * 10 ^ 15 * Hz; 2.33 * 10 ^ 13 * Hz; 9.99 * 10 ^ 13 * Hz; 9.99 * 10 ^ 15 * HzWe observe a star's spectral line at 510 nm which is normally at 500 nm. How fast is the star moving towards or away from us?