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Give an answer to a riddle and win a 10 watt laser

Give an answer to a riddle and win a 10 watt laser

Please watch the video carefully and write your answer

Give an answer to a riddle and win a 10 watt laser
Give an answer to a riddle and win a 10 watt laser

Here is a riddle:

We have a 10 watt laser that is programmed with an Arudino for a minimum power (duty ratio) and frequency.

1Hz and 1 duty ratio.

When we aim the beam at an anodized plate – we can hear a sound.

When we turn it on a max power – there is no sound.

When we aim the beam at a cink steel on a min power – no sound.

The question: why does it happen?

The first comment explaining the phenomena with at least 1 equation describing the process will get a 10W laser.

Hurry up!

If you do not know the answer but you bring the person who give the right answer – you will get 8.5 watt laser as a gift!

Share with your friends!

All questions and comments leave here or join our community on Google disk.

Our collective mind on Google Drive

A winner explanation

By Ulisses Lopes (Portugal)

If you have more questions please email me gf@EnduranceRobots.com

 

 

(A new updated video about the sound spectrum)

The spectrum remains the same on all laser power.

The sound remains the same on all materials.

 

 

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