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= ΜΕ ΑΣΦ Submit Request Answer ▾ Part B ? °C By what factor does the total radiation from the filament increase due to this temperature change? Enew Eold Ο 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= ΜΕ ΑΣΦ Submit Request Answer ▾ Part B ? °C By what factor does the total radiation from the filament increase due to this temperature change? Enew Eold Ο ΑΣΦ Submit Request Answer ?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter34: Electromagnetic Waves

Section: Chapter Questions

Problem 34.7P: Suppose you are located 180 in from a radio transmitter. (a) How many wavelengths are you from the...

See similar textbooks

Similar questions

A 100-WW incandescent light bulb has a cylindrical tungsten filament 35.0 cm long, 0.41 mmmm in diameter, and with an emissivity of 0.28. What is the temperature of the filament? what wavelength does the spectral emittance peak?
A tungesten filament is heated to 2600.0 ∘C. Calculate the wavelength for which the emission spectrum of the filament is maximum assuming that it fully absorbes light at all wavelengths. Select one: a.λmax=1009 nm b.λmax=1087 nm c.λmax=1137 nm d.λmax=1115 nm
Question A7 The intensity of the emitted radiation by a star is at a maximum at a wavelength of 78.9 nm. a) Calculate the surface temperature of the star. b) Calculate the ratio of the intensity radiated at 65.0 nm to the maximum intensity. Assume that the star radiates like an ideal blackbody.
Assume the radiation from a heat lamp is monochromatic, with a wavelength of 1.5 μm . I =3.313 kW/m^2. a. What is the peak electric field strength, in kilovolts per meter? b. Find the peak magnetic field strength, in microtesla. c. How long, in seconds, will it take to increase the temperature of the 3.95-kg shoulder by 2.00°C, assuming that the shoulder absorbs all the radiation from the lamp and given that its specific heat is 3.47 × 103 J/(kg⋅°C)?
Suppose a hot object radiates with the twice the intensity as the sun on earth, i.e. 2600W/m2. What is the energy density of this radiation?
At 2200 degrees Celsius, the max wavelength for the Cs lamp is at 1252 nm. The measured spectral radiance is 1.86 x 10^10 J/m^3s. If the lamp is enclosed in a quartz envelope with a transmission factor of 0.92, find the spectral emissivity for the Cs lamp.
You are working in a shop and are responsible for enacting the CoVID protocols before potential customers enter the shop (shoppers are not to be admitted if they have a temperature over 38.0°C). Unfortunately, the equipment you have been given to measure a person's temperature reports their peak wavelength instead. If a person has a peak wavelength of 9.320 μm, are they allowed to enter the store? A full solution must support your answer.
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.98 m, a width of 35.5 cm and a length of 26.5 cm. Calculate the power emitted by the human body. 1.311x10³ W You are correct. Your receipt no. is 157-4629 Previous Tries What is the wavelength of the peak in the spectral distribution for this temperature? 8.56x10^-5m Hint: Use Wien's displacement law. Submit Answer Incorrect. Tries 3/12 Previous Tries Fortunately our environment radiates too. The human body absorbs this radiation with an absorbance of 97.0 percent, so we don't lose our internal energy so quickly. How much power do we absorb when we are in a room where the temperature is 20.5 °C? 625.36W Hint: Use the Stefan-Boltzmann law again. Submit Answer Incorrect. Tries 1/12 Previous Tries How much energy does our body lose in one second? Submit Answer Tries 0/12
An x-ray tube is operated at 48900 V. Calculate the minimum wavelength of the radiation emitted by this tube. If this radiation is directed at a crystal, the first-order maximum in the reflected radiation occurs when the angle of incidence is 2.93o. What is the spacing between reflecting planes in the crystal?
Calculate the energies of the following waves (in kilojoules per mole) An FM radio wave at 96.5 MHz and an AM radio wave at 1100 kHz Enter your answers numerically separated by a comma. ΕΧΕΙ ΑΣΦΑ EPM, EAM 1.06 10-47,1.21 10-49 Submit ° Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining ▾ Part B ? kJ/mol An X ray with 3.40×10-9 m and a microwave with A=6.67×10-2 m. Enter your answers numerically separated by a comma. ΜΕ ΑΣΦ 0 ? 49 Ex-ray, Eairo 9.71 10 40,4.95 101 Submit Previous Answers Request Answer remaining kJ/mol
In an aircraft, to protect a PCB from external interference signals it is housed in an Aluminum(Al) Box (this is normally referred to as shielding). Conductivity of Al is 38.2 x 106 S/m & µr = 1. What shall be the minimum thickness of the Al sheet from which this box is made, if we have to block 1.6 MHz interference signal from passing through this sheet?
Question 5 An example of Electromagnetic wave which is invisible to human eye is answered Marked out of O a. all electromagnetic waves P Fag question O b. all electromagnetic waves except gamma rays O c all electromagnetic waves except light waves O d. all electromagnetic waves except Radio waves Quertion 6 If the temperature of the metal surface is (7.6) K then calculate its value in Fahrenheit Not yet O a. -286.556 Marked out of O b. 259.444 P Flag question OC.473.080 O d.-445.720