Answered: A laser emits a narrow beam of light.… | bartleby

Related questions

Question

A laser emits a narrow beam of light. The radius of the beam is 3.2 mm, and the power
is 1.8 mW. What is the intensity of the laser beam?

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Blurred answer

Similar questions

Problem 8. A) What is the transmittance at an open-circuited end of a transmission line? Justify your answer. B) What factors determine the speed of a voltage/current wave in a transmission line? C) Why can optical fibers carry higher bit rate internet traffic than can coaxial cables? Answer this question in as much detail as you can. D) Which has a larger diffraction spreading angle, red light or blue light?
What is the peak emf generated by rotating a 1000-turn, 20.0 cm diameter coil in the Earth’s 5.00 X 10-5 T magnetic field, given the plane of the coil is originally perpendicular to the Earth’s field and is rotated to be parallel to the field in 10.0 ms?
A 10.0%-efficient array of solar cells collects sunlight with an average intensity of 700W/m2. (a) In order to absorb energy at a rate of 100W, what total area must the array have? (b) If the array were to pay for itself in two years, what is its maximum cost of the array, assuming it operates for 10.0 h per day, earning 9.00¢ for each kilowatt-hour collected?
An electromangnetic wave has a peak magnetic field of 0.0045 T. What is its peak electric field?
Currents in dc transmission lines can be 100 A or higher. Some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. For a line that has current 130 A and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? Express your answer in tes Express your answer in teslas. B = Submit Part B B BE = Submit What magnetic field does the line produce at ground level as a percent of the earth's magnetic field, which is 0.50 G. Express your answer as a percentage. ΓΕΙΑΣΦ Part C OO ΑΣΦ I Request Answer Request Answer Is this value of magnetic field cause for worry? ? T ? % No. Since this field does not differ a lot from the earth's magnetic field, it would be expected to have almost the same effect as the earth's field. Yes. Since this field does not differ a lot from the earth's magnetic field, it would be expected to have almost the same effect as the earth's field. No. Since this field is much…
H3.
A dish antenna with a diameter of 20.0 m receives (at normal incidence) a radio signal from a distant source, as shown in Figure P21.73. The radio signal is a continuous sinusoidal wave with amplitude E max = 0.20 µV/m. Assume the antenna absorbs all the radiation that fallson the dish. (a) What is the amplitude of the magnetic field in this wave? (b) What is the intensity of the radiation received by the antenna? (c) What is the power received by the antenna?
Solve the question using the equation given below.
12
A SMALL BULB RADIATES EM ENERGY IN ALL DIRECTIONS. AT A DISTANCE OF 3.0M FROM THE SOURCE, THE RMS MAGNETIC FIELD 15 4.7 x 107 T. FIND THE AVERAGE POWER OF THIS SOURCE.
A low-frequency radio wave is oscillating at a rate of 60 MHz with a peak electric field of 120 N/C. Which of the following functions is the correct excpression for the magnetic field? а. 2л B (x,t) =40µTsin -(1.2x)(10'). b. B (x,t) =0.40µTsin 2л Ос. B (x,t) =4.0µTsin 2 1.2)(10), Od. В (х,1) %3D0.40диTsin| (1.0) е. B (x,t) =0.40µTsin (1.2)
A fixed 19.7-cm-diameter wire coil is perpendicular to a magnetic field 0.57 T pointing up. In 0.25 s , the field is changed to 0.30 T pointing down. What is the average induced emf in the coil?

SEE MORE QUESTIONS