If the photoelectric effect is observed when using blue light but not red light, the threshold wavelength would be  a. be in the ultraviolet region of the spectrum. b. be between red and blue in the spectrum. c. be in the infrared region of the spectrum. d. not exist.

Q: a. shortest to longest wavelength (Shortest< ... < longest) b. lowest to highest frequency (lowest<…

A:

Q: What is true about the nature of light? Select all that apply. OLight can be reflected in different…

A: Light is composed of photons which are small packets of energy.

Q: wavelength, and energy per photon. For example, select "1" in the second column for the type of…

A:

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: What are some examples of fluorescent light and incandescent light?

A: Fluorescent lights are gas filled tubes (tube lights). The gas gets excited by electric pulses and…

Q: When an intense beam of green light is directed onto a copper surface, no electrons are ejected.…

A: The frequency that is required by the radiation to eject energy from the metal surface is called as…

Q: Explain why you don't notice that objects around you have a wavelength.

A: We do not notice that objects around you have a wavelength because mass is inversely propotional to…

Q: As the frequency increase what will happen to the energy

A: According to the law of conservation of energy, the energy cannot be created or cannot be destroyed.…

Q: what is the frequency and the energy for the typical wavelength for the infrared region of the…

A: The infrared range is usually divided into three regions: Near infrared with wavelengths 0.78 to…

Q: The speed of light is _______?           equals frequency times wavelength     is the fastest…

A:

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom or molecule: -B…

A: 1) Ground state is lowest energy state which is E Answer: E   2)  D,C, B are all excited state So,…

Q: The electron in a hydrogen atom is excited to the ?=7 shell and emits electromagnetic radiation when…

A: Electron from n=7 can return to n=6 to n=1. Number of possible spectral that could appear lines when…

Q: Mechanical waves move best through solids.

A:

Q: b): If you want to stop a fast-moving electron then what happen?

A: Electron is negatively charged particles that revolves around the nucleus in a fixed orbit.

Q: An atom can be excited   a. if it emits a photon.   b. if it collides with another atom or…

A: Excited state = When electron in an atom gains energy and move to an orbit of higher energy than…

Q: ight spectrums are

A: We can see the object in the visible region of the electromagnetic waves. Its range is 380 nanometre…

Q: Consider three different light waves in the visible spectrum: A, B, and C. The energy of Wave A is…

A: The energy of the radiation is quantized. The smallest unit of energy of the radiation is known as…

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom or molecule: B…

A: Given Energy diagram

Q: complete a data table. Your table must include each of the 8 substances with its flame color and an…

A: Flame Colour varies from one chemical compound to other. Let us see various chemical compounds and…

Q: how does the amount of impurities in water affect the ability of light to penetrate it? Second…

A: Results &amp; Analysis and Conclusion:

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: 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: Which has the longer wavelength: green light or violet light? A) green light B) violet light C)…

A: As we can say the wavelength according to VIBGYOR.

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: Use this diagram to complete the table below. Which is the ground state? (pick one) How many excited…

A: Ground State is defined as the state having lowest energy and the states other than ground state are…

Q: Any consumer sample of interest for the wavelength studied  a. absorbed in the blue region, so it…

A: The color of a compound is the complementary color of the absorbed color by the compound.

Q: A new band sensation is playing a concert and recording it for a live album to be released this…

A: Amplitude of a sound wave is also part of singing. When someone sings with a greater amplitude…

Q: .What is the amplitude of a wave? A.the distance between two crest points of a wave B.the number of…

A: We know that, Amplitude : Amplitude is the  maximum displacement of the wave form its mean position.…

Q: Pick two wavelengths of light (use 3 sig figs and units of nm). Pick one from the X-ray region and…

A: The wavelength range of X-ray region is 0.01 nm - 10 nm The wavelength range of microwave region is…

Q: Some copper compounds emit green light when they are heated in a flame. How would you determine…

A: When a light passes through a prism, the emitted light of different wave lengths will be separated…

Q: Based on the photoelectron spectrum, identify the unknown element and write its electron…

A: a) based on the given photo electron spectrum the predicted electronic configuration of the element…

Q: Green light can have a wavelength of 512 nm. What is the energy of a single photon of this light?

A:

Q: Consider two beams of light: Beam A and Beam B. The energy of Beam A is less than the energy of Beam…

A: Answer is :

Q: What is the difference between intensity and wavelength?

A: Wave length: Wavelength is defined as the distance between two successive crests or two successive…

Q: Use the visible spectra above to complete the table for mercury. Report your answer using the…

A: The visible spectra are given, and it is required to calculate the following for mercury,Longest…

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom or molecule:…

A: Answer :- Ground state  E  Number of excited states  2   (C and D)  Lines in the absorption…

Q: Intensity

A: Photons and intensity of light is direactly proportion to each other that means if intensity of…

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom or molecule: D…

A:

Q: What are photo electrons?

A:

Q: Why is the wave nature of matter not important for a baseball? Match the items in the left column to…

A: The de Broglie hypothesis: De Broglie proposed that just as light has both wave-like and…

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: A mercury arc lamp has a strong emission line at 546 nm. Calculate the frequency and photon energy.

A:

Q: Which happens when an atom in an excited state returns to the ground state

A: Given : Electron is an excited state and returns to the ground state.

Q: The infrared part of the solar light on the surface of earth as wavelengths between look at the…

A: Given wavelengths,

Q: b) Why electron microscope images have much higher resolution than that of light microscopes?

A: Source of energy in electron microscope is beam of electron and source of energy in light microscope…

Q: A photoelectric experiment was performed by separately shining a laser at 450 nm (blue light) and a…

A: Photoelectric effect:In this effect, it is to be supposed that electromagnetic radiations are…

Q: An electrical engineer measures the frequency of a satellite radio transmission. The frequency is…

A: Frequency can be defined as the number of electromagnetic ( radio waves in this case) through a…

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.