What is the energy of photons ( in joules) emitted by an 88.5 MHz FM radio station?
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- Photons of a certain ultraviolet light have an energy of 6.70 ✕ 10−19 J. (a) What is the frequency of this UV light? Hz(b) Use ? = c/f to calculate its wavelength in nanometers (nm). nmAn electron is fired at a metal target, reaching a speed of 1.00 x 106 m/s. On impact, it rapidly decelerates to half that speed, emitting a photon in the process. Calculate the energy and the wavelength of the photon.Barium has a work function of 2.48 eV. Calculate the maximum speed of the ejected photoelectrons when barium is illuminated by a 453 nm source.
- How many photons per second are emitted by the antenna of a microwave oven if its power output is 1 kW at a frequency of 2560 MHz? photons/sCharacteristic x-rays emitted by manganese have a wavelength of 0.210 nm. What is the energy of one of these x-ray photons? kevAn FM radio station of frequency 98.1 MHz puts out a signal of 50,000 W. How many photons/s are emitted?
- For light with a wavelength of 350 nm and with an intensity of /= 10-8 W/m², what is the number of photons/(m²s) in the light beam?How many photons with a wavelength of 450 nm is required to have a mass of 1.25 micrograms?Problem 10: We observe photons of light coming from a bright star in the night sky. One of those photons has a frequency 6.9 x 10¹4 Hz (or cycles per second). DS What is the energy of the photon in joules? Energy -
- An X-Ray machine operates at a wavelength of 0.1nm. (1eV = 1.60 x 10-19 J) (a) What is the frequency? (b) What is the energy of an x-ray photon emitted from this machine?Experiments have shown that the nervous system of the human eye effectively takes about 30 "frames" per second (like a movie camera) and that when the eye is fully dark-adapted, it needs to receive only about 500 visible photons per frame from an object to register it. Out sun radiates a power of about 3.9 x 1026W at all wavelengths, peaking in the yellow region of the spectrum (but only about one-half of this energy is in the visible range). The pupil of your dark-adapted eye has a diameter of about 8 mm. Estimate how far away a star like the sum could be and still be visible to the naked eye. The nearest visible star is about 4 ly away and most stars we see in the sky are hundreds of light years away. What does this mean for most visible stars' intrinsic brightness compared to the sun's intrinsic brightness?