He-Ne laser compared to non-coherent red light bulb.
• E+55+5
A Helium-Neon laser and a red light bulb (tungsten filament) are set out for display, presumably when the discussion is about coherent and incoherent light. Both the laser and bulb can be turned on. He-Ne laser compared to non-coherent red light bulb.
Related Demos
E+55+0
Inverse square law: Light bulb in wire frame. E+55+10
Image formed by a pinhole using three light bulbs in a box. E+55+15
Applet: Electric Field Lines around an Oscillating Charge E+55+20
Applet: Electromagnetic Wave Propagation E+55+25
Applet: Synchrotron Radiation E+55+30
Applet: Fermat's Principle E+55+35
Applet: Radiation Pressure