At a quantum level, the atoms of both glass and ground glass should be identical. If the absorption and emission of photons by electrons is what causes reflection, why does glass reflect while ground glass does not?

Q: ow does fluorescence work in bulk semiconductors?

A: The term bulk semiconductor refers to the semiconductors which have large preservation of atoms and…

Q: What are the molecular processes that occur when (a) infrared, (b) x-ray, and (c) ultraviolet…

A:

Q: Calculate the energy and frequency of a photon of electromag wavelength of 90.5 nm. If this…

A: We know that Wavelength is related to energy and frequency by E = hν = hc/λ, where E = energy, h =…

Q: How does the number of carbon atoms correlate to the refractive index? How about in the case of…

A: The refractive index, represented by symbol n, is the velocity of light in vacuum divided by the…

Q: Use the absorption spectra to explain the colors seen under the room light.

A: The colors that we can see in the room light lies under the visible spectrum. It ranges from 400nm…

Q: 14.8)  The resolution of visible and UV spectra can usually be improved by recording the spectra at…

A: UV-Visible spectra are obtained due to electronic transitions between different values.

Q: What is single-crystal X-ray analysis ?

A: Using technique of single-crystal X-ray analysis .

Q: The light produced by a red neon sign is due to the emission of light by excited neon atoms.…

A: When the light is passed through a prism, it separates into different frequencies it contains. This…

Q: Define refractive index of liquids . How we measure the refractive index of liquid by abbe's…

A: The refractive index of a material is a  dimensionless number that describes how fast light travels…

Q: Chemistry If the absorption onset of a quantum dot with unknown size is measured to be 542 nm, what…

A: Solution- the absorption onset of a quantum dot is detected from UV-visible and fluorescence…

Q: .A diffraction grating has 410 lines per mm. If light of wavelength 560 nm is sent through this…

A:

Q: The atoms of the medium then continually absorb and re-emit the particles of light which increases…

A: Speed of light changes  from propagating one medium to other because on going one medium to other…

Q: A laser Light was shone through a diffraction grating whose lines were 1/1000 mm apart. The distance…

A: It is given that diffraction grating lines are 0.001 mm apart, and the distance between the centre…

Q: What is the relationship between pathlength and absorbance? Explain this relationship based on your…

A: Relation between path length and absorbance is given by the following expression written below :…

Q: Which of the following statements is true about diamagnetic solids? a. Have atoms with randomly…

A: There are various types of compounds based on their behaviour against magnetic field.They are…

Q: 3. Calculate the speed of light in a diamond. The index of refraction in diamond is 2.417. Remember…

A: Refractive index is basically defined as the ratio of speed of light in vacuum with the speed of…

Q: A UV light with a wavelength of 250. nm is shone on the silver surface. What is the incident energy…

A: Energy is inversely proportional to wavelength

Q: Which light source emits radiation in the infrared region? Select one: a. xenon arc lamp b.…

A: a) Xenon-arc lamp emits radiation in the near IR region. b) Deuterium arc lamp emits radiation in…

Q: Explain the various phenomenon happen when an electron beam impinges on the specimen.

A: When an electron beam impinges on the specimen the various phenomenon happens are :  ==> the…

Q: Why can algae perceive light across the visible spectrum?

A: Visible spectrum is the part of the electromagnetic spectrum which is visible to the human eye.

Q: Which property of laser light is NOT correctly defined/described? extremely bright: high power at…

A:

Q: If unpolarized light shines through two polarizing filters oriented at 90 degrees to each other,…

A: This can be solved by using concept of polarization using Malus law. Malus law states, I = IoCos2(θ)

Q: The most energetic among the UV, Visible, X-ray, and infrared (IR) radiations in the electromagnetic…

A: Solution:- True . In electromagnetic radiation , the frequency order is: Gamma ray > X- ray >…

Q: The absorbance of various wavelengths of light by a solution were measured. How does absorbance…

A: To define: Relationship between the intensity of light transmitted and absorbance of the light.

Q: Define the following terms:  Diffraction: Dispersion:

A:

Q: A laser li

A: Diffraction grating is done by making many parallel scratches on flat transparent material. There is…

Q: The characteristic orange light produced by sodium in a flame is due to the intense emission called…

A: Given refractive index of air, n = 1.0002926. Wavelengths measured in vacuum, λvac = 589.15788 and…

Q: What is the total amount of energy absorbed by the surface? What fractionof that energy is emitted…

A: (a) There are four different sources that transfer energy into the atmosphere. The sources along…

Q: What happens to white light when it passes through a prism

A: The optical element which has transparent flat polished surfaces is called prism, in which the…

Q: What causes light refractics, what does the index of refraction express?

A: When the light travels at a particular angle and enters a medium with a different density, then the…

Q: Differentiate between constructive interference and destructive interference?

A: The phenomenon of interaction of wave with each other is known as interference. Depending upon the…

Q: 22) A parallel beam of monochromatic light of wavelength 490nm is incident on a diffraction grating.…

A:

Q: A detector measures the amount of light generated by the flame and not absorbed by iron. True False

A:

Q: The refractive index of water is 0.33 .a 1.33 .b O 1.5 .c O 0.5 .d O

A: Refractive index is inversely proportional to velocity of light in that particular medium. So more…

Q: Ultraviolet light with a wavelength longer than about 295 nm has little germicidal value. What is…

A: Given: The wavelength of the ultraviolet light = 295 nm Or wavelength = 295 ×10-9 m    (1nm = 10-9…

Q: Which of the following is the purpose of beam splitter in double beam photometer or colorimeter? O…

A: Double beam spectrophotometer is used to compare the light intensity of light of reference sample…

Q: Which of the following statements describe phosphorescence?     A. the emission of a photon during…

A:

Q: You left a glass full of homogenized milk on a table undisturbed for half an hour. What would result…

A: To the eyes, milk may appear homogeneous but it is a heterogeneous mixture. However,  homogenized…

Q: How can the Diffraction from a Crystal be obtained?

A: The slight bending of light which passes around the boundary of an object is termed as diffraction.…

Q: obtain the relation between polarizability and distance between two atoms

A: Relation between polarozability and atomic radius is given as follows

Q: A researcher prepares a solution that is found to have an absorbance of 1.000 at a wavelength of…

A: Applying Beer's Lambert lawa

Q: If light is neither reflected nor absorbed by a material, what happens to it? Photons do not enter…

A:

Q: What is the diagonal effect? How does it explain the similarity in chemistry between, for example,…

A: Diagonal effect is the relationship between two adjacent elements which are located in second and…

Q: How would a decrease in the wavelength of light affect the resolution power of a bright-field…

A:

Q: When two waves are in-phase with each other, this is called constructive interference. O True O…

A: 1. When  two wave reach Creast and trough in same time and they have same wavelength are said to be…

Q: Question 10 Which of the following monochromator terms is NOT correctly defined? refraction:…

A: Answer  Which of the following monochromator terms is not correctly…

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.