Our club is preparing for my school festival,
and we are planning to make a parabola.
The matter is, we are going to use laser to show people that
if the light go into the parabola, it goes through the focus of the parabola.
SO, the laser beam should be seen, but we bought a laser that is not strong enough to see the beam.
What kind of laser should we buy??
We need laser that we can see the beam clearly.. but not so expensive though
and we are planning to make a parabola.
The matter is, we are going to use laser to show people that
if the light go into the parabola, it goes through the focus of the parabola.
SO, the laser beam should be seen, but we bought a laser that is not strong enough to see the beam.
What kind of laser should we buy??
We need laser that we can see the beam clearly.. but not so expensive though
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