4-30. he threshold frequency of a metal can be determined from measurements of the speed of the ejected electrons. Electrons were ejected from a metal with a speed of 5.00 x 105 m-s¹ when irradiated by light having a wavelength of 390.0 nm. Determine the threshold frequency of this metal.

Q: In your own words, explain the relationship of wavelength and frequency.

A: Using Einstein's  energy relation we can derive the relation between frequency and wavelength

Q: thermionic and photoelectric effect. (b.) An electromagnetic radiation of wavelength 6.3 × 10-14m…

A:

Q: What is the frequency of a particle of wavelength 752.4 nm?

A: Given  Wavelength  = 752.4 nm 1 nm   = 10-9  meter  752.4   =  752.4 × 10-9  meter     Hence…

Q: A photon with a wavelength of 1681 nm was emitted from a hydrogen atom as an electron "fell" from…

A: Given- Wavelength of photon = 1681 nm Initial  energy level = 11 To find Final energy level

Q: Assuming that the smallest measurable wavelength in an experiment is 0.270 fm, what is the maximum…

A: The mass is calculated by using the following equation.

Q: A proton travels through space with an effective wavelength of 3.00 x 10^-12m? What is its speed?

A: Electromagnetic spectrum involves different radiations from the lowest to the highest frequency…

Q: What is the frequency of a photon that is absorbed when a hydrogen atom undergoes a transition from…

A: Rydberg formula: The wavenumber for the transition in the hydrogen atom can be calculated from the…

Q: To resolve an object in an electron microscope, the wavelength of the electrons must be close to the…

A:

Q: Determine the energy of a photon with a wavelength of 404 nm.

A: Energy of a Photon is 4.92x10-19J

Q: The quantum yield of light-induced chemical reactions (called photochemical reactions) measures the…

A: Interpretation - The maximum amount (in moles) of CH3X that breaks apart is to be explained.…

Q: What is the speed of an electromagnetic wave with a frequency of 1.33 × 1 0 17 Hz and a wavelength…

A: The product of wave length and frequency of the wave gives the speed of electromagnetic wave. Write…

Q: The red lasers used to read the barcodes of products at the grocery stores produce light with a…

A: Energy of a photon E = hcλ where, h = plank's constant = 6.63×10-34kg m2s c = speed of light =…

Q: 4) Below is a very nice line spectrum of a fluorescent light. It consists of peaks in the areas of…

A: Solution: The wavelengths given are Violet , Blue ,Green,Yellow and Red. When They are emitted…

Q: How fast must a 142-g baseball travel in order to have ade Broglie wavelength that is equal to that…

A: Given : mass of baseball = 142 g And wavelength of baseball = λ = wavelength of a X-ray photon = 100…

Q: Find the velocity of an electron ejected by a metal whose threshold frequency is 2.25 x 1014 s-1…

A: Given,  Threshold frequency = fo = 2.25 x 1014 s-1  Wavelength of visible light = λ = 515.5 nm  Find…

Q: A proton in a linear accelerator has a de Broglie wavelength of 122pm. What is the speed of the…

A:

Q: cientific notation rounded to three significant figures.

A: Given,  Wavelength (L) = 220 nm = 220×10-9 m Energy(E) = hc/L    = 6.626×10-34 × 3 ×108/220×10-9 =…

Q: What is the average speed of a beam of hydrogen atoms if they have a wavelength of 125 pm? Mass of a…

A:

Q: The resolution limit of a microscope is roughly equal to the wavelength of light used in producing…

A:

Q: A sample of excited atoms lie 3.054×10−19 J3.054×10−19 J above the ground state. Determine the…

A: The energy associated with an electromagnetic radiation is equal to hv where h is the Planck’s…

Q: When a particle of mass 9.1 × 10¯ g in a certain one-dimensional box goes from the n = :5 level to…

A:

Q: Determine the velocity of a medicine ball (m = 10.0 kg) with a wavelength of 1.33 × 10-35 m.

A:

Q: Calculate the wavelength in nm of 5.14 x 10¹4 s-1 light. Do not report units in your answer. Report…

A:

Q: To resolve an object in an electron microscope, the wavelength of the electrons must be close to the…

A: Given, Diameter = 3.10nm Mass of an electron = 9.11×10−31 kg

Q: Assuming that the smallest measurable wavelength in an experiment is 0.890 fm0.890 fm , what is the…

A: The expression for calculating the de Broglie wavelength is as follows,…

Q: A proton travels through space with an effective wavelength of 3.00x10^-12 m. What is its speed?

A: The de Broglie equation of wavelength is given below.

Q: Alejandra just finished making her hydrogen calibration curve. Her data is best described by the…

A: Scale reading on X axis Wavelength (nm) on Y axis

Q: Calculate the energy of a photon of light of the frequency of 5.6 х 1014 Hz

A:

Q: How fast must a 144.9−g baseball travel in order to have a de Broglie wavelength that is equal to…

A: De-Broglie equation is given as,

Q: The reciprocal of the wavelength for one of the emissions from an excited hydrogen at is found to be…

A:

Q: For a hydrogen atom, calculate the wavelength of light (in m) that would be emitted for the orbital…

A:

Q: An electron in a hydrogen atom relaxes to the n = 4 level, emitting light of 114 THz. What is the…

A:

Q: The threshold frequency of a metal can be determined from measurements of the speed of the ejected…

A:

Q: A proton in a linear accelerator has a de Broglie wavelength of 122 pm. What is the speed of the…

A:

Q: Be sure to answer all parts How fast must a 143.9−g baseball travel in order to have a de Broglie…

A: Given data,  Mass of baseball = 143.9 g  de Broglie wavelength = 75.0 pm

Q: Calculate the energy of a photon that has a wavelength of 91.1 nm.  Recall that 1 m = 109 nm.

A: Energy = 2.18x10-18J

Q: For a transition between n = 4 and n =2 of the H atom, the wavelength of the light emitted is 486…

A: Energy of a wave is inversely proportional to the wavelength and the ratio of the product of Plank's…

Q: Calculate the frequency of a photon with energy of 5.38 x 1017 J. Select the correct answer: Oa.…

A: Energy of photon = 5.38 × 10-17 J Frequency = ?

Q: A local FM radio station broadcasts at a frequency of 89.8 MHz. Calculate the wavelength at which it…

A:

Q: wavelength

A:

Q: 2. Given that the speed of light is 3.0 x 108 m s1,, show that the frequency of blue light having a…

A: Given speed of light = 3.0 ×1088m/sec Wavelength  = 480nm 1nm = 10-9 m Formula  used  Wave number  =…

Q: A 100. W lamp emits red light of wavelength 680 nm. How many photons can the lamp generate in 26…

A: This problem this problem is based on Planck's Quantum theory E = hλc where the symbols have their…

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.