A laser emits a pulse of light that lasts 10 ns. The light has a wavelength of 690 nm, and each pulse has an energy of 480 mJ. How many photons are emitted in each pulse? Let 1 eV = 1.60 × 10−19 J, the mass of an electron m = 9.11 × 10−31 kg, the speed of light c = 3.00 × 108 m/s, and Planck’s constant h = 4.136 × 10−15 eV ∙ s.

Q: In an X-ray photoelectron experiment, a photon of wavelength 150 pm ejects an electron from the…

A: In this problem we take speed of the electron when it emerges from the atom is 21.4×106 m/s. Data…

Q: An electron has a kinetic energy of 5.4 eV. What is the energy of a photon whose wavelength is the…

A:

Q: X-rays of wavelength A = 84 pm are scattered from a carbon target, and the scattered rays are…

A: Given that: Wavelength, λ=84 pm=84×10-12mAngle of scattering, ϕ=158°

Q: When light with a frequency f1 = 547.5 THz illuminates a metal surface, the most energetic…

A:

Q: An electron is moving with a speed of 8.00 x 10° m/s. What is the speed of a proton that has the…

A: Speed of electron = 8 * 106 m/s

Q: Find the wavelength and the energy of a photon involved in the following electron transitions. a)…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: Planck hypothesized that the blackbody radiation has discrete energy. Calculate the energy of a…

A: Planck's law is E=hv…

Q: The work function of a certain material is 4.9 eV. What is the photoelectric minimum (threshold)…

A: Given: The work function is 4.9 eV.  To determine: The photoelectric minimum frequency.  The energy…

Q: n electron with a mass of 9.11 x 10–31 kg is accelerated to 25% the speed of light (c = 3.00 x 108…

A:

Q: An electron is in the first excited state, n = 2, of a Hydrogen atom. What wavelength of light…

A:

Q: The magnitude of the spin angular momentum, in terms of Planck's constant h, for a proton is A. 2.00…

A: The formula to calculate the spin angular momentum is, p=ss+1h2π

Q: In a photoelectric experiment using a sodium surface, you find a stopping potential of 1.85 V for a…

A:

Q: The energy of an ultraviolet light is 3.28 eV. (i)     What is its wavelength? (Given: h=6.63✕10-34…

A: Given data: The energy of ultraviolet light E= 3.28 eV.

Q: The three lowest energy levels of the electron in the Hydrogen atom have energies energies E₁= -21.8…

A:

Q: A hypothetical atom has three energy levels: the ground-state level and levels 1.25 eV and 2.75 eV…

A: When an atom absorbs energy from incident radiation, then it jumps from a lower energy level to a…

Q: A photon emitted as a hydrogen atom undergoes a transition from the n = 8 state to the n = 2 state.…

A:

Q: A laser emits a pulse of light with an energy of 5.0 x 103 J. If the frequency of light is 2.0 x…

A: Given data: Total Energy (E) = 5.0×103 J Frequency (f) = 2.0×1015 Hz Required: Number of pulse (n)

Q: A 2 mW laser operates at a wavelength of 500 nm. The number of photons that will be emitted per…

A:

Q: 41. The wavelength A of de Broglie waves associated with an electron (mass m, charge e) accelerated…

A:

Q: What is the work function of potassium?

A: This question is based on the Photo-Electric Effect topic. When electromagnetic radiations i.e.…

Q: A metal alloy of unknown composition was bombarded with 186 nm photons to determine its…

A:

Q: Find the frequency of the photon emitted when hydrogen makes a transition between energy level 6 to…

A: n1=4 n2=6

Q: For a hydrogen atom, the transition to a state of excitation energy (10.19 eV) emits a photon of…

A:

Q: An electron in a particular atom jumps from an orbit where the energy is higher than that of the…

A:

Q: An X-ray photon with a wavelength of 0.999 nmnm strikes a surface. The emitted electron has a…

A: Given  Wavelength = 0.999 nm  Kinetic energy of electron = 990eV  1 eV = 1.602*10-19 J  So energy of…

Q: The threshold frequency of silver is 0.967 × 1015 Hz. What is the work function of silver? Planck’s…

A:

Q: a. (i) Calculate the wavelength (in nm) for an electron (mass = 9.11×10-31 kg) travelling at a speed…

A:

Q: (prt 1)A photon emitted as a hydrogen atom undergoes a transition from the n = 4 state to the n = 2…

A: 1. The energy of the emitted photon is E=-13.6 eVn2∆E=-13.6 eV42--13.6 eV22=2.55 eV1.6×10-19 J1…

Q: A blackbody (a hollow sphere whose inside is black) emits radiation when it is heated. The emittance…

A:

Q: A metal alloy of unknown composition was bombarded with 196 nm photons to determine its…

A:

Q: A photon is emitted when a hydrogen atom undergoes a transition from the n = 9 state to the n = 1…

A: a) When an electron is jump from Higher orbit to lower orbit, the wavelength of the photon is given…

Q: What is the work function of the metal, if the light of wavelength 4000 Å generates photoelectron of…

A:

Q: A photocathode has a work function of 2.4 eV. The photocathode is monochromatic radiation in which…

A: Given data *The given photon energy is E = 3.5 eV = 3.5 × 1.6 × 10-19 J = 5.6 × 10-19 J *The given…

Q: A photon emitted as a hydrogen atom undergoes a transition from the n = 7 state to the n = 2 state.…

A:

Q: A bullet from a .357 Magnum has a mass of 11.66 gms and a muzzle velocity of 387 m/s. What is the…

A: Given :       Mass of bullet, m = 11.66 gms = 11.66*10-3 kg       Muzzle velocity, v = 387 m/s

Q: The kinetic energy of an electron taken from a metal having a work function W = 1.36 eV with photon…

A:

Q: A neutron of mass m = 1.67 x 10-27 Kg is moving with a speed of 5.0 m/s. Find its De Broglie…

A:

Q: Light of frequency 12x1015 Hz shines on to clean caesium metal. What is the maximum kinetic energy…

A:

Q: A mercury atom emits light at many wavelengths, two of which are at (1) 404.7 nm and (2) 435.8 nm.…

A:

Q: (PART 1)Light of wavelength 350 nm falls on a potassium surface, and the photoelectrons have a…

A: When a photon is incident on a substance, the photoelectrons are only emitted if the incident photon…

Q: An electron, traveling at a speed of 9.00 x 107 m/s, strikes the target of an X-ray tube. Upon…

A:

Q: nd Planck’s

A:

Q: Calculate the de Broglie wavelength of an electron having a mass of 9.11 x 10-31 kg and a charge of…

A: Given    Calculate the de Broglie wavelength of an electron having a mass of 9.11 x 10-31 kg and a…

Q: Calculate the wavelength (nm) and the energy (J) of the first line of the hydrogen spectrum in the…

A: This is a question from the Atomic and Molecular Physics. The first line in the bracket series…

Q: Starting from rest, an electron accelerates through a potential difference of 49 V. What is its de…

A: Given data: Potential difference V=49V

Q: Visible light falls into wavelength ranges of 400-700 nm, for which 1 m=1×109 nm The energy and…

A: Given data:  The wavelength of the photon λ = 632.3 nm Planck constant (h) = 6.626 × 10-34 Js Speed…

Q: A free electron with kinetic energy 12eV collides with a Hydrogen atom and causes the atom to be…

A: Kinetic energy of free electron,KE=12 eV Ground state energy of hydrogen atom, E0=-13.6 eV First…

Q: Calculate the longest wavelength of the photon emitted in the Balmer series during an electron…

A: Balmer series is the one in which an electron transits from an higher orbit to orbit corresponding…

Nature of light

Light is transverse and electromagnetic radiation that exhibits the properties of a wave as well as a particle. For this reason, light is said to have a “dual nature.”