The redshift measurements of spectra from magnesium and iron are important in understanding distant galaxies. What are the Kα and Lα wavelengths for magnesium and iron?
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The redshift measurements of spectra from magnesium and iron are important in understanding distant galaxies. What are the Kα and Lα wavelengths for magnesium and iron?
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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 WayHypothetically if the 100W bulb only produced green light, and 10% of the energy consumed was used to produce green light (λ=500nm), the number of green photons produced each second is ___x1019
- find the temperature of the coolest star whose peak blackbody wavelength can be observed with the human eye (the exact range of visible light varies from publication to publication, so use 380nm to 750 nm).Consider a large interferometer that uses a lazer with the wavelength of 1,073.27 nm (1073.27 x 10-9m). What is the frequency of the photons emitted by this beam in hertz?2.90 x 106 nm : K Find the wavelength (in mm) of maximum intensity of the cosmic microwave background radiation observed today. ( Hint: Use Wien's law, Amay mm What band of the electromagnetic spectrum is that in? (Examine the figure.) Visible light Short wavelengths Long wavelengths 4 x 107 5x 107 6x 107 7x 10meters (400 nm) (500 nm) (600 nm) /(700 nm) Wavelength (meters) 10 12 10 10 10 104 102 1 102 104 Gamma- Micro- Ultra- violet X-ray Infrared Radio ray wave UHF VHF FM AM Opaque Visual window Radio window Transparent Short Wavelength Long b O microwave O gamma ray O ultraviolet o o o Opacity of Earth's atmosphere