Quick Answer:The Laser Pen, Red is a lightweight 0.5 milliwatt red laser pen for ray optics demonstrations and simple diffraction work. One press switches it on and it stays on until pressed again.
Last updated: 18 October 2026
Key Features
Latching button: press once to switch on, press again to switch off, so no finger is needed on the button.
Lightweight pen format.
Useful for ray optics demonstrations and simple diffraction work.
Doubles as a pointer on overhead images during presentations.
Technical Specifications
Specification
Value
Power
0.5 milliwatts
Beam colour
Red
Switch
Latching push button
How It Is Used
In the optics laboratory the red beam can be used to trace ray paths through mirrors, lenses and glass blocks, or shone through a slit or grating for simple diffraction. Teachers can also use it to point at details on projected overhead images.
Frequently Asked Questions
Does the button on the Laser Pen, Red have to be held down?
No. Once pressed, the pen stays on until the button is pressed again, so you do not have to keep your finger on it.
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