Physics, 09.10.2019 05:20 djjdjdjdjdNfnd1941
Light from a he-ne laser (wavelength 632.8 nm) falls on a photo-emissive cell with a quantumefficiency of 10-4(the number of electrons emitted per incident photon). if the laser power is 2 mw, and all liberated electrons reach the anode, how large is the current? could you estimate the work function of the cathode material by varying the anodevoltage of the photocell?
Answers: 3
Physics, 22.06.2019 03:30
Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)
Answers: 1
Physics, 22.06.2019 09:30
For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap
Answers: 1
Physics, 22.06.2019 10:30
In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?
Answers: 1
Physics, 22.06.2019 21:10
Which radioisotope is used in dating geological formations?
Answers: 3
Light from a he-ne laser (wavelength 632.8 nm) falls on a photo-emissive cell with a quantumefficien...
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