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How does the beam diameter change in the near field

How does the beam diameter change in the near field compared to the far field?Choose only ONE best answer. A It becomes narrower
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2. 33 views
How does the beam diameter change in the near field compared to the far field?Choose only ONE best answer. A It becomes narrower
1. 1 answer
2. 32 views
A laser emits 1.42 1018 photons per second in a beam of light that has a diameter of 1.82 mm and a wavelength of 524.0 nm.
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2. asked by Anonymous
3. 1,510 views
What happens to the beam diameter in the far field?Choose only ONE best answer. A It stays the same as the transducer diameter B
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2. 20 views
What is the width of the beam in the far field compared to the element diameter?Choose only ONE best answer. A Equal to element
1. 1 answer
2. 25 views
A beam of protons is accelerated through a potential difference of 0.745 kV and then enters a uniform magnetic field traveling
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2. asked by J
3. 1,510 views
What is the width of the beam in the far field compared to the element diameter?Choose only ONE best answer. A Equal to element
1. 1 answer
2. 25 views
A beam of electrons moving in the x-direction at 8.3Mm/s enters a region where a uniform 240G magnetic field points in the
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2. asked by tali
3. 1,675 views
An electron beam of a TV picture tube is accelerated through a potential difference of 2.00 kV. It then passes into a magnetic
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2. asked by J
3. 724 views
1.a concentrated load p is applied at the end of cantilever.the crosssection of the beam is a square of side "a" and with a hole
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2. asked by venkeatesh vanigandla
3. 1,646 views