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- 1. What is the difference between spectral emission and absorption lines? And what is their origin? 2. What is one instance when Boltzmann’s constant appears?1. What is wave-particle duality? How does it apply to photons and electrons? Why do we not generally observe this in everyday life? 2. What is the Hubble Law? What does it say about the evolution of the universe? What does it have to do with redshift?What is critical temperature Tc? Do all materials have a critical temperature? Explain why or why not.
- 1. Explain the process of excitation, de-excitation, and ionization. 2. What are Lyman, Balmer, and Paschen series of a hydrogen atom? 3. What will be the wavelength of light emitted when in a hydrogen atom an electron jumps from n=5 to n=3 shell? What will be the name of this emission line? What type of telescope/spectroscope (UV, visible, or IR) will you need to observe and record this emission line? 4. You detected a strong Hβ emission line spectrum from your source toward the center of the Milky Way. What can you tell about the nature of the radiation source? 5. An electron in an excited state falls to the ground state by interaction with a free electron. Write the equation to represent this process. Will any photon be emitted in this case? Why or why not? 6. What is optical depth? What happens if a medium is optically think? Optically thin? 7. Using the radiative transfer equation of a simple slab-like absorbing medium with no internal emission source, I = I0 exp(−n σ x), where I0…What is background absorption and background correction. How does the use of a continuum light source help with background correction?What is a graybody? How does it differ from a blackbody? What is a diffuse gray surface?
- How can a single photon or electron diffract? What allows light to be characterized as both a particle and a wave?Pls solve this question correctly in 5 min i will give u like for sure 1- What is the wavelength corresponding to a neutron of mass 1.67 × 10-27 Kg moving at 2360 m/s? 2- Calculate the number of photons having a wavelength of 10.0 m required to produce 1.0 kJ of energy? 3- Calculate the frequency and the energy of blue light that has a wavelength of 400 nm? 4- A photon has a frequency () of 2.68 x 106 Hz. Calculate its energy? 5- Calculate the energy and frequency of red light having a wavelength of 6.80 x 10-5 cm?1. what is the objective of studying millikan oil drop experiment? 2. what is the principle of millikan oil drop experiment?
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