optics.gif (6954 bytes)

REFLECTION GRATING
(This demonstration is not done anymore)








EQUIPMENT
    redball.gif (326 bytes) UV Light SourceSeco
    redball.gif (326 bytes) Reflection Grating and Holder
    redball.gif (326 bytes) Shield
   



NARRATIVE
            An ultraviolet light source illuminating a reflection grating results in a characteristic bright line spectrum. Caution! Warn students not to look at the UV source as UV radiation is harmful to the eye. Use a shield for the demonstration.

            Allow the UV source a 1 minute warm-up. Place the grating holder in a universal clamp so that reflected light is cast on a screen. First, second, and third order patterns can be viewed by rotating the grating.