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- Problem 1 A certain He-Ne laser cavity of the type shown in Figure 6 has a mirror separation of 30 cm. The helium-neon laser gain medium is capable of supporting laser light of wavelengths in the range from A1 = 632.800 nm to A2 = 632.802 am. Find: a. The approximate number m of half-wavelengths that fit into the cavity b. The range of frequencies supported by the helium-neon gain mediumX rays with a wavelength of 0.15 nm undergo first- order diffraction from a crystal at a 64° angle of incidence. ▾ Part A What is the angle of second-order diffraction? Express your answer using two significant figures. 02 = ΜΕ ΑΣΦ Submit Request Answer ?Part A While using a dimmer switch to investigate a new type of incandescent light bulb, you notice that the light changes both its spectral characteristics and its brightness as the voltage is increased. If the wavelength of maximum intensity decreases from 1800 nm to 1620 nm as the bulb's voltage is increased, by how many °C does the filament temperature increase? AT = 179 °C Submit Previous Answers Part B Correct By what factor does the total radiation from the filament increase due to this temperature change? Η ΜΕ ΑΣΦ ? Enew Eold 1.65 Submit Previous Answers Request Answer × Incorrect; Try Again; 3 attempts remaining
- A pulsed laser produces brief bursts of light. One such laser emits pulses that carry 0.400 J of energy but last only 300 fs . Part A What is the average power during one of these pulses? Pav = 1.33x1012 W Submit Previous Answers Correct Part B Assuming the energy is emitted in a cylindrical beam of light 2.10 mm in diameter, calculate the average intensity of this laser beam. ? Iay = W/m? Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part C What is the rms electric field in this wave? ? Erms = V/m Submit Request AnswerQ1What is the maximum wavelength λmax for a hot object of 10,000 oC? A. λmax = 282 nm B. λmax = 282 m C. λmax = 482 nm D. λmax = 289 nm
- A hydrogen atom, initially at rest, absorbs an ultraviolet photon with a wavelength of λ = 169.8 nm. ▼ Part A What is the atom's final speed if it now emits an identical photon in a direction that is perpendicular to the direction of motion of the original photon? Express your answer to three significant figures and include appropriate units. .0 Value Submit ΜΑ Part B Units Request Answer μA What is the atom's final speed if it now emits an identical photon in a direction that is opposite to the direction of motion of the original photon? Express your answer to three significant figures and include appropriate units. ? Q Search P Pearson Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | ט 7:22 12/11/2552 RADIATED EMISSIONS AND SUSCEPTIBILITY (8.1.4) A wire carrying a 1 mA current at 100 MHz is parallel to and 1 cm from an infinite, perfectly conducting ground plane as shown in Fig. P8.1.4. Deter- mine the electric field 3 m above the ground plane. [0.877 mV/m] 3m 1 mA 1 m. FIGURE P8.1.4. 1 cmHe-Ne lasers are often used in physics demonstrations. They produce light of wavelength 633 nm and a power of 0.500 mW spread over a cylindrical beam 1.50 mm in diameter (although these quantities can vary). Part A What is the intensity of this laser beam? Express your answer in watts per meter squared. ? I = 637 W/m? Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Part B What is the maximum value of the electric field? Express your answer in volts per meter. Emax = 462 V/m Submit Previous Answers v Correct Part C
- X rays with a wavelength of 0.15 nm undergo first-order diffraction from a crystal at a 64° angle of incidence. Part A What is the angle of second-order diffraction? Express your answer using two significant figures. 02 = ΜΕ ΑΣΦ Submit Request Answer Provide Feedback ?What will be the energy associated with a red photon, if the wavelength of the red light is 650 nm? [Hint: Find the frequency of red light first to calculate the energy. Recall: c = .f] A. 650x10° J B. 6.5x10 J C. 4.6x1014 J D. 3.0x10-19 J E. 3.0x1019 J1. What is the wavelength of a radio photon from an AM radio station that broadcasts at 1470 kilohertz? Express your answer to three significant figures and include the appropriate units. 2. What is the energy of a radio photon from the same station? Express your answer to three significant figures and include the appropriate units. For question 1 I am not sure how to solve it because the frequency is in kilohertz and I don't know how to convert it into something that I can use. For the speed of light in this question, would it be best to use 3 x 10^8 m/s or 3 x 10^5 km/s? For question 2 I have the formula to use, I'm just uncertain of how to use it.
