Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Chapter 5, Problem 17E
Explain why hotter objects tend to
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Chapter 5 Solutions
Astronomy
Ch. 5 - What distinguishes one type of electromagnetic...Ch. 5 - What is a wave? Use the terms wavelength and...Ch. 5 - Is your textbook the kind of idealized object...Ch. 5 - Where in an atom would you expect to find...Ch. 5 - Explain how emission lines and absorption lines...Ch. 5 - Explain how the Doppler effect works for sound...Ch. 5 - What kind of motion for a star does not produce a...Ch. 5 - Describe how Bohr’s model used the work of...Ch. 5 - Explain why light is referred to as...Ch. 5 - Explain the difference between radiation as it is...
Ch. 5 - What are the differences between light waves and...Ch. 5 - Which type of wave has a longer wavelength: AM...Ch. 5 - Explain why astronomers long ago believed that...Ch. 5 - Explain what the ionosphere is and how it...Ch. 5 - Which is more dangerous to living things, gamma...Ch. 5 - Explain why we have to observe stars and other...Ch. 5 - Explain why hotter objects tend to radiate more...Ch. 5 - Explain how we can deduce the temperature of a...Ch. 5 - Explain what dispersion is and how astronomers use...Ch. 5 - Explain why glass prisms disperse light.Ch. 5 - Explain what Joseph Fraunhofer discovered about...Ch. 5 - Explain how we use spectral absorption and...Ch. 5 - Explain the results of Rutherford’s gold foil...Ch. 5 - Is it possible for two different atoms of carbon...Ch. 5 - What are the three isotopes of hydrogen, and how...Ch. 5 - Explain how electrons use light energy to move...Ch. 5 - Explain why astronomers use the term “blueshifted”...Ch. 5 - If spectral line wavelengths are changing for...Ch. 5 - Make a list of some of the many practical...Ch. 5 - With what type of electromagnetic radiation would...Ch. 5 - Why is it dangerous to be exposed to X-rays but...Ch. 5 - Go outside on a clear night, wait 15 minutes for...Ch. 5 - Water faucets are often labeled with a red dot for...Ch. 5 - Suppose you are standing at the exact center of a...Ch. 5 - How could you measure Earth’s orbital speed by...Ch. 5 - Astronomers want to make maps of the sky showing...Ch. 5 - The greenhouse effect can be explained easily if...Ch. 5 - An idealized radiating object does not reflect or...Ch. 5 - Why are ionized gases typically only found in very...Ch. 5 - Explain why each element has a unique spectrum of...Ch. 5 - What is the wavelength of the carrier wave of a...Ch. 5 - What is the frequency of a red laser beam, with a...Ch. 5 - You go to a dance club to forget how hard your...Ch. 5 - What is the energy of the photon with the...Ch. 5 - If the emitted infrared radiation from Pluto, has...Ch. 5 - What is the temperature of a star whose maximum...
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- The Sun’s radiative power output is 3.846 × 1026 W and its emission spectrum peaks at 501.5 nm. Wien’s constant is 2.898 × 10−3 m ∙ K. a) Which region of the electromagnetic spectrum does the Sun’s peak-emission wavelength belong to? b)Calculate the surface temperature of the Sun: c)How much energy does one peak-emission photon carry? d)Estimate the number of photons leaving the Sun’s surface each second:arrow_forwardA high-energy photon has frequency of 10 ×1014 Hz. Determine its energy in Joules and eV. What is the wavelength of waveform associated with this photon (in nm)?arrow_forwardQuestion 4 Treat the surface of the sun as a perfect blackbody at a temperature of 5800K. According to Planck's distribution law, how manyphotons are emitted by the sun in the high-energy end of the visible spectrum (around 380nm) for every photon emitted in the low-energy end (around 680nm)?arrow_forward
- What aspects of photons are similar to those of other particles, such as electrons? In what ways do they differ from one another? Do photons have a mass of their own? Do they have a source of electricity? Is it possible to get them accelerated? What kind of mechanical characteristics do they have?arrow_forwardThe average human body temperature is 98.6°F. According to ________ law, if your body temperature is 98.6°F then your wavelength of peak emission is around 9 microns (µm). This implies that your body emits _____________ radiation. Stefan-Boltzman, infrared Stefan-Boltzman, visible Wien's, infrared Wien's, visiblearrow_forwardCheck Your Understanding An iron poker is being heated. As its temperature rises, the poker begins to glow-first dull red, then bright red, then orange, and then yellow. Use either the blackbody radiation curve or Wien’s law to explain these changes in the color of the glow.arrow_forward
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