The intensity (flux) measured from a distant star is 5.2 x 10-7 W/m2. The wavelength of...
The intensity (flux) measured from a distant star is 5.2 x 10-7 W/m2. The wavelength of maximum power of the star is measured to be 290 nm. Using an HR diagram, estimate the distance to the star from Earth.
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The intensity (flux) measured from a distant star is 5.2 x 10-7
W/m2. The wavelength of...
If a spectral line from a distant star is measured to have a wavelength of 497.14nm,...
If a spectral line from a distant star is measured to have a wavelength of 497.14nm, but is normally at 497.22nm how fast (speed, not velocity) with respect to the Earth is the star moving in m/s?
The light at the Earth from a certain star has an intensity of about 80.5×10-8W/m2. If...
The light at the Earth from a certain star has an intensity of about 80.5×10-8W/m2. If the star emits radiation with the same power as our Sun, how far away is it from Earth? NOTE: Use 1000 W/m^2 as the intensity of the Sun at the Earth!
The light at the Earth from a certain star has an intensity of about 83×10-8W/m2. If...
The light at the Earth from a certain star has an intensity of about 83×10-8W/m2. If the star emits radiation with the same power as our Sun, how far away is it from Earth? NOTE: Use 1000 W/m^2 as the intensity of the Sun at the Earth!
1. The intensity of a particular earthquake wave is measured to be 1.60 x 106 W/m2...
1. The intensity of a particular earthquake wave is measured to be 1.60 x 106 W/m2 at a distance of 40.0 km from the source. What was the intensity when it passed a point only 1.00 km from the source? Assume that earthquake waves travel uniformly in all directions W/m2 2. The team monitoring a space probe exploring the outer solar system finds that radio transmissions from the probe take 2.10 hours to reach earth. How distant (in meters) is...
The apparent brightness of a star is 1.0 × 10-12 W/m2 and the peak wavelength is...
The apparent brightness of a star is 1.0 × 10-12 W/m2 and the peak wavelength is 600 nm. Estimate its distance from us. 0.090 pc 0.90 pc 900 pc 9.0 pc 90 pc I do not understand how 179.24 pc relate to the answer choices I am given.
The intensity of a light beam with a wavelength of 500 nm is 2000 W/m2. The...
The intensity of a light beam with a wavelength of 500 nm is 2000 W/m2. The photon flux (in number/m2 ⋅ s) is about:
7. Ultraviolet light with wavelength equal to 350 nm and intensity of 1.0 W/m2 is directed...
7. Ultraviolet light with wavelength equal to 350 nm and intensity of 1.0 W/m2 is directed at a ted as a calcium surface. What is the maximum possible kinetic energy of electrons ejec result of this type of radiation? Give answer in units of eV? [10 points]
Monochromatic light of wavelength 544 nm from a distant source passes through a slit that is...
Monochromatic light of wavelength 544 nm from a distant source passes through a slit that is 0.0330 mm wide. In the resulting diffraction pattern, the intensity at the center of the central maximum (θ = 0∘) is 5.00×10−5 W/m2 What is the intensity at a point on the screen that corresponds to θ = 1.20∘? Express your answer with the appropriate units.
Monochromatic light of wavelength 466 nm from a distant source passes through a slit that is...
Monochromatic light of wavelength 466 nm from a distant source passes through a slit that is 0.0330 mm wide. In the resulting diffraction pattern, the intensity at the center of the central maximum (θ = 0∘) is 1.26×10−4 W/m2 . What is the intensity at a point on the screen that corresponds to θ = 1.20∘. Express your answer to three significant figures and include the appropriate units.
Light of wavelength 400 nm and intensity 10-2 W/m2 is incident on potassium. (a) Estimate the...
Light of wavelength 400 nm and intensity 10-2 W/m2 is incident on potassium. (a) Estimate the time lag for the emission of photoelectrons expected classically. Assume the typical radius of an atom is 10-10 m. Hint: Relate the light intensity to the work function for potassium. Please explain answer clearly. (also, please explain how you got the work function for potassium)
1. The intensity of a particular earthquake wave is measured to be 1.60 x 106 W/m2 at a distance of 40.0 km from the source. What was the intensity when it passed a point only 1.00 km from the source? Assume that earthquake waves travel uniformly in all directions W/m2 2. The team monitoring a space probe exploring the outer solar system finds that radio transmissions from the probe take 2.10 hours to reach earth. How distant (in meters) is...
7. Ultraviolet light with wavelength equal to 350 nm and intensity of 1.0 W/m2 is directed at a ted as a calcium surface. What is the maximum possible kinetic energy of electrons ejec result of this type of radiation? Give answer in units of eV? [10 points]
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