Answer:
a lens shouldn´t be necessary at all. What you are sending to the SLM should be a phase plate encoding Bessel beam you want.
hope it helpful for you
<h3>XxinstaprincixX</h3>
Explanation:
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Answer:
(C) Plants use oxygen to make their own food
If it makes 50 complete back-and-forth wiggles in 1 second, then its frequency is <em>50 Hz</em>.
Answer:
When a polythene rod is rubbed with a duster, the friction causes electrons to gain energy. Electrons gain enough energy to leave the atom and 'rub off' onto the polythene rod. The polythene rod has gained electrons, giving it a negative charge.
Explanation:
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