What is metastable state?

Q: Explain blackbody readition

A: To understand black body radiation, you need to first understand a black body. It is a kind of body…

Q: the energy of the most energetically possible photon emitted is

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Q: What was milikans theory about

A: American experimental physicist Robert Andrews Milikan was honored with the Nobel Prize for the…

Q: What happens to an electron when a photon hits it?

A: As per Compton effect, when a photon strikes an electron at rest, some of its energy is lost to the…

Q: When and where do Newton’s laws of motion and quantum mechanics overlap?

A: Newton’s laws of motion describes with high degree of accuracy about the dependence of the motion of…

Q: All objects radiate energy. Why, then, are we not able to see all the objects in a dark room?

A: All the objects emit electromagnetic radiation. Our eyes can see visible lights only, which have…

Q: Calculate the momentum of a photon of energy 6×10-J.

A: Given, Energy of photon E = 6 x 10-19 J

Q: Is it necessary that that every black coloured objects should be considered a blackbody?

A: A perfect black body is a body that absorbs all the radiation that falls on it.

Q: If a butterfly causes a tornado, does it make sense to eradicate butterflies? Defend your answer.

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Q: What is Helmholtz free energy ?

A: Helmholtz free energy is a thermodynamics concept in which, thermodynamic potential is used to…

Q: Calculate the energy in corresponding to light of wavelength 45nm.

A: Given : λ= 45 nm = 45 x 10-9 m We need to calculate the energy for the given wavelength E = hcλ…

Q: How does the difference in energy levels relate to energy of the photon that is emitted by a…

A: The energy of a photo emitted during transition between two energy levels will be equal to the…

Q: What were Leibnitz's intentions with his calculator all along?

A: In 1671 the German mathematician-philosopher Gottfried Wilhelm von Leibniz designed a calculating…

Q: Is 34 steps a scalar quanity?

A: The main basic difference between a scalar and vector is :  " The scalar always have a magnitude…

Q: Exactly what is it that “corresponds” in the correspondence principle?

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Q: An elebron falli through uni form electie freld" of by electron in falling is a distance of scm ina…

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Q: Why won’t a very bright beam of red light impart more energy to an ejected electron than a feeble…

A: Violet has more frequency than red .Energy of electromagnetic radiation is directly proportional to…

Q: What are the four states of matter?

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Q: Discuss in brief the path of light through a droplet.

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Q: What happens when an electron collapses back to its ground state from an excited state?

A: To explain: What happens when an electron collapses back to its ground state from an excited state?

Q: Describe the Uncertainty Principle?

A: Uncertainty principle is also called indeterminacy principle. In quantum physics, according to…

Q: Explain the term Colliding beams?

A: COLLIDING BEAMS:                        Colliding beam or collider  is a particle accelerator used…

Q: Why was helium discovered in the sun’s spectrum before being observed on Earth? Why was hydrogen…

A: The spectrum from the sun was observed to have a bright yellow line in it and this line was earlier…

Q: What is electron emission?

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Q: Do we inadvertently alter the realities that we attempt to measure in a public opinion survey? Does…

A: The Heisenberg’s uncertainty principle is applicable only to quantum realm but it serves as popular…

Q: Choose the BEST answer to the following. The discrete orbits of electrons is best understood when…

A: Electrons orbit in only certain orbits because according to quantum mechanics, the electrons are…

Q: off light that appears to be redshifted?

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Q: what were two that waves could do that particles could not do? Briefly describe them.

A: It light travels as particies we can imagine particles of light (photons) as bullets fired from a…

Q: What is the maximum number of electrons  in (in the 5-th orbit of atom) the fifth principle energy…

A: The maximum number of electrons in any orbit or atom is 2n2…

Q: Do the electrons behave like waves?

A: Electrons are subatomic particles that hold an elementary charge of magnitude -1. The charge of an…

Q: Did Einstein support quantum mechanics as being fundamental physics, or did he think quantum…

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Q: Explain the Boltzmann Factor ?

A: It is also known as Boltzmann Distribution. It is a probability measure that gives the probability…

Q: What is a quantum of light called?

A: Quantum of light

Q: What is a matter wave?

A: According to dual nature of matter all matter has both particle and wave nature.The waves associated…

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.