what is the colour of blue ray disk
The scanner that reads the barcodes uses a laser.
I think the color of the laser is blue
a red laser like a CD
Blue
How can yo u get laser beam?What is laser beam characteristics and principles?
Blue thus the name.
A laser beam is a narrow, focused, and intense beam of light produced by a device called a laser. Laser beams are used in various applications such as cutting, welding, medical procedures, and communication systems due to their ability to deliver high energy in a precise manner.
"Caution Laser Beam" is a phrase used on warning signs and labels to alert users and passersby that a laser beam may be present.
*BLU* ray the answer just in case you missed it is blue
optical fiber
A laser modulator is used to change modulate a beam of light (or laser). The easiest way that they modulate the laser, or light beam, is by changing the rate at which the laser is emitted from the source.
It does depend on the kind of laser, but the main difference is that a laser emits a focused beam of light of the same wavelength (i.e. color) while a flashlight emits light of many different wavelengths, and 'beams' this light by reflecting it using a concave mirror built into it behind/around the bulb.