Is a 100mw Green Laser Too Powerful for Double Slit Experiments and Microscopy?

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Discussion Overview

The discussion centers around the suitability and safety of using 100 mW and 30 mW green lasers for conducting double slit experiments and microscopy. Participants explore concerns regarding the power levels of these lasers and their implications for safety and effectiveness in experimental setups.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions whether a 100 mW green laser is too powerful for double slit experiments and microscopy, suggesting a 30 mW laser might be a better option.
  • Another participant argues that a cheap laser pointer is sufficient for such experiments, implying that high power is unnecessary.
  • Some participants express concern about the safety of using class III lasers, noting that both the 100 mW and 30 mW lasers pose hazards if not handled properly.
  • There are warnings about the dangers of using high-powered lasers, including potential blindness from reflected beams, and the need for safety measures and training when using such devices.

Areas of Agreement / Disagreement

Participants generally agree on the potential dangers of using high-powered lasers, particularly class III devices. However, there is disagreement regarding the necessity of using such powerful lasers for the intended experiments, with some advocating for lower power options.

Contextual Notes

Participants reference safety regulations and guidelines for laser use, indicating that the discussion is influenced by concerns about proper handling and the risks associated with high-powered lasers. Specific safety measures and training requirements are mentioned but not elaborated upon.

zepp0814
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Hi forums I really want to do some experiments with lasers and i was wondering if for the double slit experiment a 100mw green laser is so powerful and bright. also there is a 30mw laser, would that be better. another thing is that i wanted to make a laser "microscope" but i was worried that a 100mw was too bright, should i worry about that.


*that 100mw has an adjustable focus
 
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You don't need anything so powerful and dangerous. A cheap laser pointer works fine.
 
I agree with Vanadium- both the 100 mW and 30mW lasers are class III devices, and unless you understand how to deal with those hazards, you should not be using them. The maximum eye-safe power for a visible laser is 1 mW (0.39 uW for continuous exposure without the blink reflex).
 
Andy Resnick said:
both the 100 mW and 30mW lasers are class III devices, and unless you understand how to deal with those hazards,

Not only that. Where I work lasers as powerful as >30 mW (well, anything class III or above) can only be used in designated areas equiped with interlocks and other safety equipment, and these areas can only be accessed by trained personel.

The point is: DONT USE LASERS LIKE THAT! They are extremely dangerous, and even a reflected beam could make you blind for life.
 

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