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- What are the wavelengths of (a) X-rays of frequency 2.01017 Hz? (b) Yellow light of frequency 5.11014Hz ? (C) Gamma rays of frequency 1.01023Hz ?The potential difference V(t) between parallel plates shown above is instantaneously increasing at a rate of 107V/s. What is the displacement current between the plates if the separation of the plates is 1.00 cm and they have an area of 0.200m2?Suppose a spherical particle of mass m and radius R in space absorbs light of intensity I for time t. (a) How much work does the radiation pressure do to accelerate the particle (mm rest In the given tine It absorbs the light? (b) How much energy canted by the electromagnetic waves is absorbed by the particle over this time based on the radiant energy incident on the particle?
- Suppose you are located 180 in from a radio transmitter. (a) How many wavelengths are you from the transmitter if the station calls itself 1150 AM? (The AM band frequencies are in kilohertz.) (b) What if this station is 98.1 FM? (The FM band frequencies are in megahertz.)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/molA rocket zooms past the earth at v= 2.0 x 10 m/s. Scientists on the rocket have created the electric and magnetic fields shown in the figure.(Figure 1) Assume that B = 0.60 T and E= 6.0x105 V/m. Figure B E 2.0 x 10 m/s 1 of 1 What is the electric field strength measured by an earthbound scientist? Express your answer using two significant figures. 5 ΑΣΦ E = Submit Part B X Incorrect; Try Again; One attempt remaining Check your signs. O Up -6.105 What is the direction of the electric field measured by an earthbound scientis Down Submit Part C O Left O Right O Into the page O Out of the page Previous Answers Request Answer B = 0.60 T Submit ? Request Answer What is the magnetic field strength measured by an earthbound scientist? Express your answer using two significant figures. Correct Previous Answers V/m
- Consider an electromagnetic wave with a maximum magnetic field strength of 7.5 × 10-4 T.Randomized VariablesB = 7.5 × 10-4 T What is the maximum electric field strength in the wave in kV/m?ed k ces A particular form of electromagnetic radiation has a frequency of 2.74 × 10¹5 Hz. (a) What is the wavelength in nanometers? In meters? Enter your answer in scientific notation. x 10 x 10 (b) To which region of the electromagnetic spectrum would you assign it? X-ray visible nm microwave m infrared ultraviolet radio wave gamma ray x 10 (c) What is the energy (in joules) of one quantum of this radiation? Enter your answer in scientific notation. J1:.0 O %).. N O a all zain 1Q O 24 May 2021 a... H.W: If a (10 mJ) laser pointer creates a spot that is 5 mm in diameter in a 30 second, determine the radiation pressure on a screen that absorbs 40% of the light that strikes it.
- A plane harmonic electromagnetic wave is propagating in space along the y axis. If the E- field is linearly polarised in the yz-plane and if lamda= 500 nm, what is an expression for the corresponding B field when the irradiance is 53.2 W/m2?The ICNIRP also has guidelines for magnetic-field exposure for the general public. In the frequency range of 25 Hz to 3 kHz, this guideline states that the maximum allowed magnetic-field amplitude is 5>f T, where f is the frequency in kHz. Which is a more stringent limit on allowable electromagnetic-wave intensity in this frequency range: the electric-field guideline or the magnetic-field guideline? (a) The magnetic-field guideline, because at a given frequency the allowed magnetic field is smaller than the allowed electric field. (b) The electric-field guideline, because at a given frequency the allowed intensity calculated from the electric-field guideline is smaller. (c) It depends on the particular frequency chosen (both guidelines are frequency dependent). (d) Neither—for any given frequency, the guidelines represent the same electromagneticwave intensityAssuming the energy density of the cosmic background radiation of the Big Bang has the value 3.75 ✕ 10−14 J/m3, what is the corresponding electric field amplitude (in mV/m)?