A series of smaller spots are spaced out on either side of the pattern's central, larger spot.
<h3>What is a helium-neon laser used for?</h3>
When compared to other gas lasers, helium xenon lasers are inexpensive and straightforward to operate. They have a long history of employment in numerous industries, including holography, biomedical engineering, metrology, spectrometry, optical disc reading, barcode scanning, and microscopy.
<h3>How does the helium-neon laser operate?</h3>
By energizing Neon molecules in the atmosphere, a He-Ne laser produces light. The Neon particles decay from a higher energy state to that of an ordinary state, producing the 632.8 nm optic light that the laser emits. For the given basic research, a comprehensive determination of quantum (state) is not necessary.
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A is the answer to your question
20 minuets is 1/3 of an hour so you multiply 30 km by 3 and get 90 km/hr
Explanation:
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Hurricanes and tropical storms can also spawn tornadoes and microbursts, create storm surges ... If you are unable to evacuate, go to your wind-safe room.