The star Sirius is much hotter than the sun, with a peak wavelength of 290 nm compared to the sun’s 500 nm. It is also larger, with a diameter 1.7 times that of the sun. By what factor does the energy emitted by Sirius exceed that of the sun?

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.

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Q: A dish antenna having a diameter of 16.0 m receives (at normal incidence) a radio signal from a…

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Q: Show work !

A: Electromagnetic radiation which includes radio waves travel at 3×108 m/sec

Q: Determine the radiation pressure and energy density of sunlight on Earth, assuming an intensity of…

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Q: A sun-like star is barely visible to naked-eye observers on earth when it is a distance of 7.0 light…

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Q: An intense light source radiates uniformly in all directions. At a distance of 10.0 m from the…

A: Given data: Distance from the source is 10.0 m Radiation pressure on the surface is p=22.5×10-7 Pa

Q: What is the frequency of infrared light that has a wavelength of 850 nm? A) 3.53 × 105 Hz B) 2.55 ×…

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Q: A spotlight shines onto a square target of area 0.35 m2. If the average (rms) strength of the…

A: Given information RMS value of the magnetic field of em wave Brms = 1.2 × 10-7 T Area of the target…

Q: A loop antenna, such as is used in a television to pick up UHF broadcasts, is 38.9 cm in diameter.…

A: diameter (d) = 38.9 cm = 0.389 m frequency (f) = 373 MHz magnetic field through the loop is given by…

Q: In a plane radio wave the maximum value of the electric field component is 4.85 V/m. Calculate (a)…

A: Given: The amplitude of the electric field is 4.85 V/m.

Q: At what distance from a 8.0 W point source of electromagnetic waves is the magnetic field amplitude…

A: Given: The power of the source is 8 W. The amplitude of the magnetic field is 0.70 μT.

Q: 10. The sun's electromagnetic radiation peaks at the wavelength λ = 555 nm. What is the frequency f…

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Q: A detector is situated 10 Meters from a cellphone . It receives a signal in which the electric…

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Q: 12 km from a radio station’s transmitting antenna, the amplitude of the electric field is 0.12 V/m…

A: Given: The amplitude of the electric field = 0.12 V/m The radius of the transmitting antenna = 12 Km…

Q: A microwave has average intensity : 10* W/m² 4 what will be amplitude of the electric field strength…

A:

Q: A certain star is 15.7 million light-years from Earth. The intensity of the light that reaches Earth…

A: GivenDistance between star and earth, r=15.7 million light yearThe intensity of light that reaches…

Q: The beating heart of a person in a relaxed state creates a maximum 3.90 mV potential across 0.33 m…

A:

Q: A space probe which is a distance of 1.9×1010 m from a star measures the total intensity of…

A: Part A) The expression for the total average power output is,

Q: An isotropic point source emits light at wavelength 500 nm, at the rate of 50 W. A light detector is…

A: Given: Wavelength = 500 nm r = 200 m

Q: A high-energy pulsed laser emits a 1.0-ns-long pulse ofaverage power 1.5 x 1011 W .The beam is…

A: Given: To determine the energy and the rms value of a high energy pulsed laser using the given…

Q: The distance between Planet X and a star is 1.8 x 1011 m. At the surface of Planet X, the average…

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Q: The distance to the North Star, Polaris, is approximately 6.44 x 1018 m. (a) If Polaris were to burn…

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Q: Consider the electromagnetic radiations having wavelengths 200 nm, 500 nm and 1000 nm. Which…

A: Human eye can detect lights in the visible range. In other words, visual image of human eye is in…

Q: A small laser emits light at power 5.00 mW and wavelength 633 nm. The laser beam is focused…

A: The cross-sectional area of the beam is the cross-sectional area of the sphere,   The diameter of a…

Q: Determine the range of wavelengths in the microwave radiation band. O a > 0.3 m 0.3 m > > 3 × 10-4 m…

A: option b is the correct one as the actual range of microwave is 10-3 to 10-1 meter. The microwave…

Q: During normal beating, the heart creates a maximum 4.20 mV potential across 0.320 m of a person's…

A: Given Information:- Maximum potential created by the heart is V=4.20mV=4.20mV×10-3 V1 mV=4.20×10-3 V…

Q: 3. A monochromatic light source emits electromagnetic radiation uniformly in all directions (isotrop…

A: Given, the intensity of light at a distance of r = 25.0 m from the source: I = 2.00 x 10-5 W/m2.…

Q: The smallest size of a car (wavelength) that can be detected by a radar is 2.5 m, the frequency (in…

A:

Q: A TV antenna has length L. The electromagnetic signal it can best pick up has a wavelength of _____…

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Q: An intense light source radiates uniformly in all directions. At a distance of 5.0 m from the…

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Q: The intensity of electromagnetic energy from the Sun reaching the Earth is 1,390 W/m². Earth is…

A: Given information: The Intensity of sunlight received by earth (I1) = 1,390 W/m2 The distance of…

Q: An isotropic point source emits light at wavelength 500 nm, at the rate of 50 W. A light detector is…

A: Given values: Incident light's wavelength, power P = 50 W location of detector d = 200 m

Q: Light waves travel in a vacuum at a speed of 300 000 km/s. (a) The frequency of the longest visible…

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Q: The intensity of solar radiation that falls on a detector on Earth is 1.00 kW/m2. The detector is a…

A: Given Data: Intensity of radiation, I=1 kWm2=1000 Wm2 Side of squared detector, a= 6.11 m Angle…

Q: certain 60.0 Hz AC power line radiates an electromagnetic wave having a maximum electric field…

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Q: An intense light source radiates uniformly in all directions. At a distance of 10.0 m from the…

A: The intensity of radiation on a surface is defined as Power per unit area and given by- I=PA The…

Q: 60. 4. Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with…

A:

Q: What is the wavelength of the electromagnetic wave emitted by the oscillator–antenna system if L=…

A: Given:  Inductance, L = 0.253 mH = 253 x 10-6 H Capacitance, C = 25 pF = 25 x 10-12 F speed of wave…

Nature of light

Light is transverse and electromagnetic radiation that exhibits the properties of a wave as well as a particle. For this reason, light is said to have a “dual nature.”