3. Discharge lamps
• In most of the streets sodium
vapor lamps are used as street
lights.
• These lights has no filament .
• They are called discharge lamps.
4. PARTS AND WORKING OF DISCHARGE LAMP
PARTS
A glass tube having a suitable
gas at low Pressure
Electrodes are connected at the
ends of the glass tube
5. WORKING
WHEN A HIGH VOLTAGE IS APPLIED TO THE
ELECTRODES THE GAS GET IONIZED .
THESE IONS AND ELECTRONS ARE COLLIDE
WITH EACH OTHER & LIGHT IS PRODUCED.
THESE IONS AND ELECTRONS ARE COLLIDE
WITH OTHER MOLECULES LIGHT IS PRODUCED.
6. Sl no GAS IN THE DISCHARG
LAMP
COLOER OF THE LIGHT
1 NEON ORENGE RED
2 NITROGEN RED
3 MERCURY WHITE
4 CHLORINE GREEN
5 HYDROGEN BLUE
6 SODIUM YELLOW
