A star's spectrum peaks at 500 nm. What is the surface temperature of the star? O a.5000 K О b.2000 К C.5.8 x 106 K d.5800 K
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- Using the Bohr model of a hydrogen atom, consider the transition from n = 5 to n = 3. What is the frequency of the photons emitted by hydrogen atoms when they undergo transitions from n = 5 to n = 3? Hz In what region of the electromagnetic spectrum will this light appear?Choose one: A. visible B. ultraviolet (UV) C. infrared (IR) D. microwave1. If the maximum wavelength in the sun spectrum Amax =480 nm and a = 2.89x103 K.m calculate the sun surface temperatureThe Sun appears to be yellow when overhead because:1. The human eye is most sensitive to yellow. 2. Yellow frequencies are transmitted better through the atmosphere. 3. Air does not absorb yellow frequencies. 4. The temperature of the Sun is 6000 K. 5. More than one of the above. 6. None of the above.
- 2/3 2/3 1/2 1/2 1/2 According to the plots choose the appropriate indices from below: A. [120] B. [001] C. [10] D. [112] E. [301] F. (111] G. H. [012 1. (230) J. (233) K. (131) L (135) M. (300) N. (100) O. (111) P. (010) What is the Direction of OA?using the Bohr model of a hydrogen atom, consider the transition from n= 5 to n=3. what is the frequency of the photons emitted by hydrogen atoms when they undergo transitions from n =5 to n=3?1a. A particle confined in a rigid one-dimensional box of length 13.1fm has an energy level En =25.59MeV and an adjacent energy level En+1=36.85MeV. Determine the values of n and n+1. 1b. What is the wavelength of a photon emitted in the n+1 to n transition? 1c. What is the mass of the particle?
- 1. Calculate the energy of a photon whose frequency is (a) 5.00×10¹4 Hz, (b) 10.0 GHz, (c) 30.0 MHz. Express your answers in electron volts.Who manufacturing Evm machine?2. The wavelength of maximum intensity of the sun's radiation is observed to be near 500 nm. Assume the sun to be a black-body and calculate,imsed of (a) the sun's surface temperature (b) the power per unit area (intensity) emitted from he sun's surface. (c) At what rate is the sun losing mass in units of kg/s? (Hint: What are the units from rignslavaw wert odrai Jari W (d) your answer in part (b)?) (d) At that rate, how much time would it take to exhaust the sun's fuel supply? Does your answer seem reasonable? (The sun's mass is ~2.0x1030 kg)
- 6. What is the temperature of an object if the peak wavelength of its blackbody spectrum is 1200 micrometers? a. 2.4 K b. 25 K С. 322 К d. 833 K e. None of these CS Scanned with CamScanner6. Use Boltzmann distribution to solve this problem. A system consists of 3,000 particles that can only occupy two energy levels: a nondegen- erate ground state of 0.052 eV and a threefold degenerate excited state at 0.156 eV. If T = 900 K, (а) find the number of particles at each energy level. –0156 ev (b) what is the total energy of the system? 0,052 ev1. The speed of light in vacuum is 3 X 105 km/s and 1 km = 1,000 m and 1m = 100 cm. Use c = f A to determine the frequency of a photon with a wavelength of 2 cm.