(1) The intensity of blackbody radiation peaks at a wavelength of 668 nm.
(a)What is the temperature (in K) of the radiation source? (Give your answer to at least 3 significant figures.)
(b)Determine the power radiated per unit area (in W/m2) of the radiation source at this temperature.
(2) What is the binding energy in eV of electrons in ruthenium, if the longest-wavelength photon that can eject electrons is 264 nm?
(1) The intensity of blackbody radiation peaks at a wavelength of 668 nm. (a)What is the...
The intensity of blackbody radiation peaks at a wavelength of 608 nm. (a) What is the temperature (in K) of the radiation source? (Give your answer to at least 3 significant figures.) ______K (b) Determine the power radiated per unit area (in W/m2) of the radiation source at this temperature. _______ W/m2
What is the binding energy in eV of electrons in ruthenium, if the longest-wavelength photon that can eject electrons is 264 nm?
What is the longest-wavelength EM radiation in nm) that can eject a photoelectron from zirconium, given that the binding energy is 4.05 eV? nm Is this in the visible range? Yes No Additional Materials Reading
7. Ultraviolet light with wavelength equal to 350 nm and intensity of 1.0 W/m2 is directed at a ted as a calcium surface. What is the maximum possible kinetic energy of electrons ejec result of this type of radiation? Give answer in units of eV? [10 points]
c = 3.0 x 108 m/s; b = v/c; g (gamma) = 1/sqrt[1 – b2]; u = (u’ + v) / (1 + u’v/c2); Eph = hf = hc/l; P = esAT4; s = 5.67 x 10-8 Watts / m2 / K4 1.Photon Energy. Calculate the energy of a visible-light photon having a wavelength of 450 nanometers. Express both in Joules and as electron-volts (eV). 2. Blackbody Radiation. The human body emits energy as infrared radiation. Take the absolute temperature...
Potassium is illuminated with ultraviolet light of wavelength 250 nm. The ultraviolet light has an intensity of 2.0 W/m2 2. a. What is the energy of a photon of the ultraviolet light? Convert this energy to Joules. Es496cV (i in.fi b. Assuming each photon liberates one electron, what is the rate of electron emission per unit area?
Monochromatic light of wavelength 466 nm from a distant source passes through a slit that is 0.0330 mm wide. In the resulting diffraction pattern, the intensity at the center of the central maximum (θ = 0∘) is 1.26×10−4 W/m2 . What is the intensity at a point on the screen that corresponds to θ = 1.20∘. Express your answer to three significant figures and include the appropriate units.
Constants Part A Monochromatic light of wavelength 469 nm from a distant source passes through a slit that is 0.0330 mm wide. In the resulting diffraction patterm, the intensity at the center of the central maximum (0- 0°) is 1.17x10-4 W/m2 What is the intensity at a point on the screen that corresponds to -1.20 Express your answer to three significant figures and include the appropriate units. 3.56 . 10.8 Submit ious Answers Request Answer
REVIEW QUESTIONS I. As the frequency of electromagnetic radiation decreases, 6. A photon has a wavelength of 3 × 10-12 m. what is its wavelength will: a. increase. b. decrease. c. remain the same. d. frequency and wavelength are unrelated frequency? a. 3 x 104 Hz b. 3 X 100 Hz c. 1 x 10- Hz d. 1 X 1030 Hz g members of the electromagnetic7. Which of the following do not originate from an unstable spectrum has the ability...
Theory section is below for the equations PRELAB Read the theory section below. Calculate the photon wavelength in nm corresponding to a photon energy equal to the theoretical band gap energy of S1.121 eV and GaAs, 1.422 eV. These will be used to set the monochromator. THEORY One of the most important characteristics of a semiconductor is its band gap energy Eg Whereas an electron in an isolated atom has discrete energy levels, an electron in a semiconductor crystal has...