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

Q: In a complete sentence describe the relationship between shielding and penetration

A: Penetration is the attraction between electrons and nucleus, whereas shielding is the repulsion…

Q: Wavelength of visible light determines color. True False

A: The wavelength  of visible light determines the color of substance that the light appears. Light…

Q: Define Line Spectra?

A: Line spectra.

Q: What is the energy content of a mole of photons at the wavelength of maximum emission?

A: The energy of a photon is equal to the product of the speed of light, or 3.0 x 108 m/s, and Planck's…

Q: What are the side effects of X-ray irradiation?

A: The electronic transitions taking place within the atoms between different energy levels generate a…

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

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

Q: Give some uses of fluorescence in medical field?

A: Introduction: If a system absorbs radiant energy and then emits it partly or completely almost…

Q: What do we call the passage of light through an object? O a O b absorption transmission reflection O…

A: Correct answer is (d) refraction. Passage of light through a medium or object is known as refraction…

Q: Differentiate between infrared radiation and microwave radiation?

A: Microwave and Infrared radiations both are the forms of electromagnetic radiation. The microwave…

Q: Classify these relationships between the properties of waves as directly proportional or inversely…

A: We know that  Energy=h×frequency Frequency= velocity of light/wavelength Energy= h×velocity of…

Q: What is the difference between the excitation and emission spectrum?

A: The peaks of emission spectrum are lower than excitation peak.

Q: Which one of the following spectra is NOT a component of a typical emission spectrum? Absorption…

A: Emission Spectrum: Emission spectra is detected when energy is emitted by transitioning electrons in…

Q: What is the frequency of radiation whose wavelenght is 660 nm?

A: The relation between frequency (v) and wavelength (λ) of a radiation is expressed in equation (1) in…

Q: Which of the following is the function of the Flame or Emission system in Atomic Absorption…

A: Atomic absorption spectroscopy is a spectroanalytical procedure for the quantitative determination…

Q: What are the components of typical spectroscopic instruments?

A:

Q: 8. Which of the following arrangement is correct in order of increasing energy: a) IR < Vis < UV b)…

A:

Q: O Immersion oil/ Oil with a different refrative index than air, used to enhance magnification O…

A: 1. Immersion oil : Oil immersion forms the fundamentals of high-quality microscopy. To understand…

Q: a. Using the diagram below, draw arrows corresponding to the process of phosphorescence. b. Briefly…

A: Welcome to bartleby ! Introduction : About phosphorescence .

Q: An excited electron cannot do which of the following? A. Transfer energy to a neighboring photon B.…

A: From the given data we need to find the fate of the excited electron.

Q: What can be concluded from the diffraction pattern generated by a single electron fired in the…

A: “Since you have asked multiple MC questions, we will solve the first question for you. If you want…

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: Beer's Law states that concentration is proportional to of light. Select one: O refraction…

A: According to the Beer's law the absorption is directly proportional to concentration and path…

Q: What are the advantages and disadvantages of using quantum dots for fluorescence imaging?

A: Quantum dots (QDs) are artificial clusters of semiconductive atoms that can confine the electrons…

Q: What processes lead to fluorescence and phosphorescence? Which comes athigher energy? Which is…

A: Introduction- The branch of chemistry that deals with the study of Photochemical reactions is called…

Q: what are the applications of Atomic Force Microscopy and explain each

A: Atomic Force Microscopy is a technique which is used to image different type of surfaces like…

Q: What does absorption of infrared radiation cause?

A: The energy of infra red radiations is quite less as compared to that of U.V radiations and…

Q: ) Is the kinetic energy of the photoelectron dependent on the X-ray beam energy?

A: Photoelectric effect :- The ejection of electron from the surface of a metal when a light of…

Q: Which light source emits radiation in the infrared region?

A: Welcome to bartleby !  Introduction :  We have to tell which light source emits radiation in…

Q: Describe what happens when atoms or molecules absorb light?

A: An atom can absorb or emit one photon, when an electron makes a transition from one stationary…

Q: Illustrate the effects of Photo-electric?

A: Photoelectric effect, phenomenon in which electrically charged particles are released from or within…

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: Which of the following is based on the emission of a second electron after high energy radiation has…

A: It is asked to mention on the basis of which effect a second electron emission after high energy…

Q: 9. Absorption spectra for molecules are more complex than atomic spectra because: C (a) Molecular…

A: The study of interaction of matter with electromagnetic radiations (e.g. light) is known as…

Q: At a quantum level, the atoms of both glass and ground glass should be identical. If the absorption…

A:

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: What are photo electrons?

A:

Q: The kinetic energy of photoelectron depends on the: a. Intensity of light b. Number of incident…

A: Solution Photoelectric impact, development within which electrically charged particles ar free from…

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

A:

Q: if an opaque substance (light does not go through it) appears red, the substance is _____ red light…

A: Opaque objects do not let any light through them.All the light that comes into cantact with an…

Q: The threshold frequency for dislodging an electron from a zinc metal surface is 8.54 x 10^14 Hz.…

A: Frequency and energy are related to each other directly.Formula,Energy = (Planck's constant x…

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

A:

Q: The energy of random atomic and molecular motion is called: a. Heat c. Spectroscopy d. Reflection…

A: Given: The energy of random atomic and molecular motion is called?

Q: Explain X-ray spectrum.

A: Explanation of X-ray spectrum has to be given below,

Q: How to find the difference in energy between two level responsible for ultraviolet emission at…

A: The difference in energy between two levels (∆E) = h ν = h c/ λ where, ∆E = difference in energy…

Q: what is inert pair effect?

A: The definition for given term inert pair effect is shown as follows,

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.