A python can detect thermal radiation with intensity greater than 0.60 W/m2. A typical human body has a surface area of 1.8 m2, a surface temperature of 30°C, and an emissivity e = 0.97 at infrared wavelengths. What is the maximum distance from which a python can detect your presence? You can model the human body as a point source of radiation.

Q: A spacecraft in orbit around the moon measures its altitude by reflecting a pulsed 10 MHz radio…

A: The wave has to travel first to the surface and then back to the spacecraft. Then only an echo will…

Q: Evaluate the intensity of solar radiation for 27 August 2020, given solar constant (Isc) =1800 W/m2.

A:

Q: The star Sirius is much hotter than the sun, with a peak wavelength of 290 nm compared to the sun’s…

A: The stars can be considered as a perfect blackbody. According to the Wein’s law, the peak wavelength…

Q: In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0 ×…

A: The frequency,

Q: | The human eye can barely detect a star whose intensity at he earth's surface is 1.6 X 10-1 W/m?.…

A:

Q: One of the highest power lasers in the world sits on a table. It emits pulses that last…

A:

Q: Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief…

A:

Q: The magnetic field of a wave propagating through a certain nonmagnetic material in the positive y…

A: Amplitude (A) = 30 mAmFrequency (f) = 1082π Hz wavelength (λ) = 12.6 m

Q: (7) A laser with a circular cross section is used to suspend a spherical aluminum bead in Earth's…

A: Electromagnetic waves transfers energy to a system by virtue of its electric and magnetic fields.…

Q: The human body has a surface area of approximately 1.8 m2, a surface temperature of approximately…

A: Given: The area A = 1.8 m2. The temperature T = 30 0C =303 K. Emissivity e = 0.97.

Q: The U.S. Food and Drug Administration limits the radiation leakage of microwave ovens to no more…

A:

Q: diation left over from the Big Bang explosion of the universe has an average energy density of 4.07…

A: Given-Average energy density u= 4.07 × 10–14 J/m3ε0=8.85×10-12Nm2/C2

Q: In one to two sentences, explain why electromagnetic radiation can be modeled as both a wave and a…

A: There is no doubt that EM radiation interferes and has the properties of wavelength and frequency.

Q: Consider six proposed properties of electromagnetic radiation: wave speeds of 3.00 x 10 km/s and…

A:

Q: Radiation of a single frequency reaches the upper atmosphere of the earth with an intensity of 1350…

A:

Q: During normal beating, a heart creates a maximum 4.25-mV potential across 0.28 m of a person’s…

A:

Q: A plane electromagnetic wave, with wavelength 3.3 m, travels in vacuum in the positive direction of…

A:

Q: A communications satellite orbiting the earth has solar panels that completely absorb all sunlight…

A: Data Given ,  Area of the panel ( A ) = 10 m2 Intensity of the sun's radiation ( I ) = 1.4 kW/m2 =…

Q: At a distance of 39 ft , an ionizing radiation source delivers 7.0 rem of radiation. How close can…

A: Given The intensity at distance 1 is I1=7 rem. The initial distance is D1=39 ft. Known value. The…

Q: The damage threshold for the retina is 100 W/m². This means that a damage to the retina can occur at…

A: a) The laser exceeds the damage threshold intensity for the retina. b) E( max.) = 1824.9 V/m     B(…

Q: (a) A laser used in orthopedic spine surgery produces radiationwith a wavelength of 2.10 mm.…

A: Apologies. We only answer one question at a time. we will answer the first one as the exact one…

Q: Question 4: An electromagnetic wave with frequency 65.0 Hz trav- els in an insulating magnetic…

A: a) Determine the speed of the wave.

Q: A plane electromagnetic wave of frequency 25 MHz travels in free space along the x-direction. At a…

A:

Q: EM radiation has an average intensity of 2200 W/m2. Which of the following statements about the E or…

A:

Q: At one instant, the electric and magnetic fields at one point of an electromagnetic wave are E =…

A:

Q: During normal beating of the heart, the maximum value of the oscillating potential difference across…

A:

Q: 7.1.5. In the 25-ft Space Simulator facility at NASA's Jet Propul- sion Laboratory, a bank: of…

A: The expression for the average radiation pressure on a totally absorbing section of the floor is,

Q: A 1.00 m diameter mirror focuses the sun's rays onto an absorbing plate 2.00 cm in radius, which…

A:

Q: A plane electromagnetic wave, with wavelength 5 m, travels in vacuum in the positive direction of an…

A:

Q: A certain star is 15.6 million light-years from Earth. The intensity of the light that reaches Earth…

A:

Q: • A cell phone transmits at a frequency of 1.94 * 109Hz. What isthe wavelength of the…

A:

Q: Queston 5 An example of Electromagnetic wave which is imvisible to human eye is Not yet anpered…

A: (5)Electromagnetic waves are also known as EM waves. Electromagnetic radiations are composed of…