Two motorcycles are located 10.00 km away from a circular radar antenna (diameter of 1.90 m and radiates at a frequency of 16.0 GHz). How close together could the motorcycles be and still be detected as two objects? (c = 3 x 10 ms).

Two motorcycles are located 10.00 km away from a circular radar antenna (diameter of 1.90 m and radiates at a frequency of 16.0 GHz). How close together could the motorcycles be and still be detected as two objects? (c = 3 x 10 ms).

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 102AP: Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically...

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Scientists use laser range finding to measure the distance to the moonwith great accuracy. A very brief (100 ps) laser pulse, with a wavelengthof 532 nm, is fired at the moon, where it reflects off an array of 100 4.0-cm-diameter mirrors placed there by Apollo 14 astronauts in 1971. The reflected laser light returns to earth, where it is collected by a telescope and detected. The average earth-moon distance is 384,000 km. The laser beam spreads out on its way to the moon because of diffraction, reaching the mirrors with an intensity of 300 W/m2. The reflected beam spreads out even more on its way back because of diffraction due to the circular aperture of the mirrors.a. What is the round-trip time for the laser pulse to travel to the moon and back?b. If we want to measure the distance to the moon to an accuracy of 1.0 cm, how accurately must the arrival time of the returning pulse be measured?c. Because of the spread of the beam due to diffraction, the light arriving at earth from one…
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E 22_Mat_Eng_Test_09_FeCph x poE 22_Mat_Eng_Test_08_phase × Po 22_Mat_Eng_Test_10_phase X po 22_Mat_Eng_Test_10_phase × 22_Mat_Eng_Test_07_diffusi x P 22_Mat_Eng_Test_07_diffusi x + O File | C:/Users/Asus/Downloads/material/22_Mat_Eng_Test_07_diffusion_23_03.pdf Q + D Page view A Read aloud T Add text V Draw E Highlight O Erase 03 18 of 25 Zjatt Application MUEGYETEM 1 7 8 2 • The diffusion coefficients for copper in aluminum at 500C and 600C are 4.8 · 10-14and 5.3 · 10-13 m²/s, respectively. Determine the approximate time at 500C that will produce the same diffusion result (in terms of concentration of Cu at some specific point in Al) as a 10 h heat treatment at • 600C. 68°F ENG 9:33 PM gb Cloudy US 5/10/2022