Consider the following statements with refrence to the fluorescent lamp or fluorescent tube 1 It is ...........

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Consider the following statements with refrence to the fluorescent lamp or fluorescent tube:

1. It is a low pressure mercury vapor gas discharge lamp.

2. An electric current in the gas excites mercury vapor which produces short wave ultraviolet light.

3. It is environment friendly.

Which of the statements given above is/are correct?

1 and 2 only

1 and 3 only

2 and 3 only

All of the above

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Explanation:

Fluorescent lamp or Fluorescent tube is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. A fluorescent lamp converts electrical energy into useful light much more efficiently than incandescent lamps. The typical luminous efficacy of fluorescent lighting systems is 50–100 lumens per watt, several times the efficacy of incandescent bulbs with comparable light output. Because they contain mercury, many fluorescent lamps are classified as hazardous waste.