Jump to 12 multiple choice question What was the major shortcoming in the classical prediction of blackbody radiation that led us to the idea of quantization of light (light treated as particles)? A. Classical theory failed to explain radiations altogether. B. Classical theory failed to explain the absorption of light by any blackbody. C. Classical theory failed to explain the emission of radiation by any blackbody. 5 6 7 8 9 10 E. None of the above. D. Classical theory failed to explain the experimental results of blackbody radiation and predicted a rapid increase in the intensity with frequency of light causing ultraviolet catastrophe.

Q: 0Exam An electron in a hydrogen atom transitions from the fourteenth state to the third state. As a…

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Q: 2.) (a) Can the following types of energy be negative, or must they be positive only? i. Kinetic…

A: 2.(a) (i) Kinetic energy :-  kinetic energy bof an object is always positive .     KE =(1/2) mv2…

Q: Incorrect Question 5 What element has a Ka line with wavelength 1.46 × 10-¹¹ m? Show your…

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Q: 1. Was Rutherford’s theory was easily accepted by other physicists? How did his findings lead us to…

A: No.Rutherford’s theory was not easily accepted by other physicists. In 1911, Niels Bohr earned his…

Q: Who was the first person to use the word "atom" to describe the fundamental particles of matter? a.)…

A: The term atom is the smallest unit of material or the definite structural element which cannot be…

Q: Which of these is a type of X-ray emitted by electrons that jump between allowed orbits in an atom?…

A: When high energetic electrons collide with inner shell electron, the inner electron is ejected…

Q: Please please please answer everything super super fast please it’s important

A: Step 1: Given data Energy levels of the atom. Step 2: Concept used  Step 3: Solution for Parts (a)…

Q: I was given a old test to practice.

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Q: What will be the energy associated with a blue photon (in Joules), if the frequency of the blue…

A: Given Data: Frequency of blue light (f) = 650 THz = 650×1012 Hz. It is known that: Plank's constant…

Q: (a) Calculate the ionisation energy, in eV. for the hydrogen atom. (b) Calculate the frequency of a…

A: The energy levels of the Hydrogen atom

Q: Determine the energies of the n = 1, 2, and 3 states in the He* ion (it has two protons in its…

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Q: A simple atom has only two absorption lines, at 200 nm and 640 nm. Part A What is the wavelength of…

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Q: From which of the following objects would you expect to see a continuous spectrum emitted? (Check…

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Q: Extra Credit (10 points) a) The visible light from a sodium vapor streetlight (the yellowish-orange…

A: Frequency of photon is,

Q: What kind of spectrum is shown below?     a. black hole spectrum   b. continuous spectrum   c.…

A: absorption line spectrum:   an electromagnetic spectrum in which a decrease in intensity of…

Q: QUESTION 10 What is the the energy (in kJ/mol of photons) of gamma ray radiation that has a…

A: Given : Frequency (f) = 7.339e+19 Hz Speed of light (c) = 3.00 x 108 m/s Planck's constant (h) =…

Q: A hydrogen atom in the n-6 state decays to the n-2 state. What is the wavelength of the photon that…

A: Step 1:Line spectra : When electrons from higher quantum state make a transition to lower quantum…

Q: Practice: Atom and the Periodic Table Vocabulary out terms to mark off that you have used them.…

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Q: 42. Which of the following do not provide scientific evidence for the concept of quantized energy?…

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Q: what is Rayleigh–Jeans assumptions ? what is Planck's assumptions ?

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Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.