4. The surface of the Sun has a temperature of about 6000 K. At what wavelength does the Sun emit its peak intensity? How does this compare with the peak sensitivity of the human eye?

Q: hat is the energy of a photon, in the unit of J, when the frequency of the electromagnetic waves is…

A: Energy = hf where h is plank constant.

Q: (xii) What is ultraviolet catastrophe?

A: The ultraviolet catastrophe was the prediction of early 20th century classical physics that an ideal…

Q: 2a. An atom in an excited state 1.94eV above the ground state remains in that excited state 1.97us…

A:

Q: 3) If the angular momentum of an electron atom of hydrogen is equal to 3.15 x10-4 J.S in what orbit…

A: SOlution: Given that angular momentum L = 3.15x10-34 JS

Q: 1. Bohr's Model can be used to find the wavelengths of the photons in the absorption or emission…

A:

Q: 5.3 The surface temperature of the Sun is 5800 K about and measurements of the Sun's spectral…

A:

Q: 40. Consider the following approximate visible light spectrum: Wavelength 7x 10-5 6 x 105 5x 10-5 4…

A: Given:Barium energy,E=3.59×10-19 JSpeed of light ,C= 3×108 m/sPlanks constant ,h=6.6×10-34 JsFind…

Q: 4. Is the number of photons in one joule of red light greater than, equal to, less than, one joule…

A:

Q: 2) How much energy is involved when a frequency of 4.36 e 15 Hz is generated?

A: Energy of an particle is related to the frequency as E = h * ν…

Q: 1. Calculate the energy, in electron volts, of a photon whose frequency is a. 620 THz, 3.10 GHz and…

A: Given, Frequency: 620 THz, 3.10 GHz, and 46.0 MHz

Q: 1. Explain the DUAL properties of light; light as a particle, and light as a wave

A: Light can be defined both as a wave and as a particle. When we're considering light as being made of…

Q: 3- Using the Bohr model: Calculate the wavelength of the first spectral lines from the Lyman, Palmer…

A: Using Bohr model: For spectral series wavelength  λ is calculated from:…

Q: 1) Determine the frequency and wavelength for a photon for a transition from level 6 to level 4 in…

A: In this question we have to determine the de Broglie wavelength of the electron in level 4. Please…

Q: 1. Why is ultraviolet radiation commonly used in sanitizing hospitals and operating rooms? 2. Using…

A: Ultraviolet rays are used in sterlizing or sanitizing hospitals and operating rooms because…

Q: 1. The temperature of stars in the universe varies with the type of star and the age of the star…

A: Given: (a) the peak power density occurs at the border between red and infrared light. To find the…

Q: Ultraviolet Radiation. There are two categories of ultraviolet light. Ultraviolet A (UVA) has a…

A: a) The frequency ranges of UVA and UVB is, For…

Q: 5. The idea that light can take on the characteristics of both waves and particles is known as…

A:

Q: Q1/ Find the total energy and the greatest wavelength of the energy emitted from the surface of the…

A:

Q: 4.If someone wanted to build a scale model of the atom with a nucleus 1 m in diameter, how far away…

A: Given: Diameter = 1m or radius rn = 0.5 m To determine: How far away would the nearest electron need…

Q: a- gamma rays b- Visible rays c- Ultraviolet rays d- Infrared waves cs Lat

A: Human can naturally see which of the following

Q: Water absorbs infrared radiation with wavelengths near 4.55 mm. Suppose this radiation is absorbed…

A:

Q: 11. During Einstein's Photoelectric Experiment, what changes are observed when the frequency of the…

A: Since, you have asked multiple questions, We will answer the first question for you. If you want any…

Q: 2. List the assumptions of the Bohr theory of the hydrogen atom.

A: Answer:-  Assumption of the Bohr theory of the hydrogen atom :-  (1) An electron moves along the…

Q: 5. An electron in the first energy level of a hydrogen atom is 5.3x10-11 m from the nucleus. What is…

A: Let the orbital speed of the electron be v, the radius of the first orbit be r, and the mass of the…

Q: 1) Determine the day of the year where the solar irradiance outside the Earth's atmosphere is equal…

A: Given :  Solar irradiance  outside the Earth's atmosphere, H = 1384 W /m2…

Q: 9. explain the de Broglie hypothesis and its relation to the Bohr model

A: To find: Relation between de Broglie hypothesis and Bohr model

Q: 5. Wien's Law states that the peak wavelength of of photons emitted by an object is inversely…

A: For a temperature T1 = 4000 K, the peak photon wavelength is λp1 = 1000 nm. Assume that for a…

Q: 1. In stimulated emission, an atom in an excited state can be induced to de-excite to a lower energy…

A: 1. When a photon of energy E=hυ is incident to a particle that are situated at the excited state…

Q: Q2: Calculate the electron velocity in the second orbit of the hydrogen atom?

A: Solution; To calculate the velocity of electron in 2nd orbit

Q: 19 A hydrogen atom in excited energy state 24 10"drops down to the ground state at energy level…

A:

Q: 1- We use photodiode to detect a. Visible light b. Invisible light c. No light d. Both visible and…

A:

Q: 1) What is the mass of a particle that is traveling at a speed of 3.25 e 5-m/s and generates a…

A: Given Data : The velocity of the particle is given as v = 3.25 x 105 m/s. The wavelength of the…

Q: 1. What frequency of light is needed to produce electrons of kinetic energy 3.00 eV from…

A:

Q: 1. What are the two most abundant elements found in stars?

A: Hydrogen and Helium are the two most abundant elements found in stars. Protons and neutrons fused to…

Q: 1- Write the calculations of the wavelengths by A° for the spectra of hydrogen in Brackett series.

A: Brackett Series is the set of emission lines from atomic hydrogen gas due to electrons descending…

Q: 15.) Because gamma rays have the highest frequency and carry the most energy, a. they are sometimes…

A: Gamma rays are produced in the disintegration of radioactive atomic nuclei in the decay of certain…

Q: 1) What is the purpose of the Stern-Clark experiment? What is the explanation for the radiation…

A: The Stern–Gerlach experiment was meant to test the Bohr–Sommerfeld hypothesis that the direction of…

Q: 2. When light with a wavelength of 218 nm is incident on a certain metal surface, electrons are…

A: Given data The wavelength of the light is given as λ=218 nm. The kinetic energy is given as KE =…

Q: 3. In the He+ ion, which transition results in UV emission? 4. In the He+ ion which transition…

A: 3. The Lyman series in the H-atom spectrum is known to be in the UV region of the Electro Magnetic…

Q: 4. Describe the following energy state transition for an electron in a hydrogen atom. List the…

A: the energy of an electron in the hydrogen atom is E=-13.6n2eV when an electron jumps from n2 to n1,…

Q: 11. During Einstein's Photoelectric Experiment, what changes are observed when the frequency of the…

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

Q: 9- The speed with which the electron must move in units (ms) in order to have a wavelength of (A0.1)…

A:

Q: At what wavelength does the human body emit most of its light? (Assume body temperature is 98.6…

A: According to wien's law   λ=b/T

Q: 4. What is the gravitational attraction between two protons (m proton = 1.67 x 10-2 kg) at a…

A: Since you have posted multiple questions we will solve the first question for you. If you want an…

Q: 3. determines the degree of hotness or coldness of a body. 4 We use a for measuring the temperature…

A: Temperature determines the degree of hotness or coldness of a body.   We use Thermometer for…

Q: 6) What is the longest wavelength that is able to ionize a hydrogen atom?

A: The longest wavelength that is able to ionize a hydrogen atom is obtained as follows

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.