A laser emits a narrow beam of light. The radius of the beam is 2.7 mm, and the power is 2.5 mW. What is the intensity of the laser beam? Number i 1.0E2 Units W/m^2
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- A laser emits a narrow beam of light. The radius of the beam is 8.3 mm, and the power is 4.3 mW. What is the intensity of the laser beam? Number i Units >A laser beam has an average intensity, S = 8,005.9 W/m2. What is the magnitude of the rms magnetic field, Brms in mT, component of the electromagnetic waves emitted by this laser? 1.0 mT = 10-6 T. Please round your answer to one decimal place. Equations: cB2 S= TIMS Ho H₂=47x10-¹Tm/ A c= 3.0x108 m/sThe intensity of solar radiation that falls on a detector on Earth is 1.00 kW/m². The detector is a square that measures 6.11 m on a side and the normal to its surface makes an angle of 30.0° with respect to the Sun's radiation. How long will it take for the detector to measure 436 kJ of energy? S
- A typical laser used in introductory physics laboratories produces a continuous beam of light about 1.90 mm in diameter. The average power of such a laser is 0.930 mW. What is the peak intensity? O 434 W/m² O 775 W/m² O 558 W/m² O 868 W/m² O 656 W/m²A dish antenna having a diameter of 16.0 m receives (at normal incidence) a radio signal from a distant source as shown in the figure below. The intensity of the radiation received by the antenna is 3.79 x 10-17 W/m². What is the power received by the antenna? a) 3.79 x 10-17 W b) 7.62 x 10-15 W c) 2.35 x 10-18 W d) 9.59 x 10-14 W d) None of these. Write your ownIf a light wave has an electric field strength of 437.3 V/m, what is the magnetic field strength in a vacuum? Express your answer in micro Tesla ( uT =*10^ ^ -6) and to 3 decimal places
- In the figure, a laser beam of power 4.50 W and diameter 2.60 mm is directed upward at one circular face (of diameter d < 2.60 mm) of a perfectly reflecting cylinder. The cylinder is levitated because the upward radiation force matches the downward gravitational force. If the cylinder's density is 1.70 g/cm³, what is its height H? Number i UnitsThe intensity of electromagnetic energy from the Sun reaching the Earth is 1,390 W/m?. Earth is about 1.5 x 1011 m from the Sun and Saturn is about 10 times further, how much power would a 1.00 m2 solar panel receive at the distance of Saturn? Provide the solution:The average Earth-Sun distance is 1.00 astronomical unit (AU). At how many AUS from the Sun is the intensity of sunlight 1/81 the intensity at the Earth? AU
- The image attached is a neat copy of a photo of an electricity meter for a domestic solar array. The display shows the energy we sold to the electricity company on a winter's day. Each box is 100 W high and 1 hr wide. At the radius of the earth's orbit, the intensity of sunlight is I=1.4 kW.m–2 . (This means that 1.4 kW.m–2 passes through 1 square metre at right angles to the sun's rays.) The solar array in the previous question consists of 10 panels, each with area A=1.6 m2 . Under optimal conditions - with the sun at right angles to the array and no clouds in the sky - the array produces Pout=2.3 kW . What is the efficiency of the array? Power out/power in = _____ %.consider a bright star in our sky. assume its distance from earth is 38.3 light-year (ly) and its power output is 4.00 * 10^28 W. about 100 times that of the sun. one light-year is the distance traveled by light through a vacuum in one year. a. find the intensity of the starlight at the earth. b. find the power of the starlight at the earth intercepts ( the radius of earth is 6.38 * 10^6 m .)At a distance of 10 km from a radio transmitter, the amplitude of the E-field is 0.20 volts/meter. What is the total power emitted by the radio transmitter?
