1 / 4

Project Prepared by

Project Prepared by. Sukanti Majhi class-viii Manaswini Padhi class-viii Govt. Girls High School Koraput. WHY DOES AN ELECTRIC BULB GIVE LESS LIGHT THAN A TUBE LIGHT?.

silvio
Télécharger la présentation

Project Prepared by

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Project Prepared by Sukanti Majhi class-viii Manaswini Padhi class-viii Govt. Girls High School Koraput

  2. WHY DOES AN ELECTRIC BULB GIVE LESS LIGHT THAN A TUBE LIGHT? • In an ordinary bulb, due to the high resistance of tungsten filament the electric current makes the filament so hot (about 2100 degree Celsius) that it glows light yellow, which then turns into a point-source of yellowish light.

  3. WHY DOES AN ELECTRIC BULB GIVE LESS LIGHT THAN A TUBE LIGHT? • Whereas the operating principle of a tube-light is completely different. • The long tube with mercury vapour filling and a coating of fluorescent material in its inner wall contains two filaments at the two ends. • The flow of electrons between the filaments causes radiation from the mercury atoms.

  4. WHY DOES AN ELECTRIC BULB GIVE LESS LIGHT THAN A TUBE LIGHT? • When this radiated energy comes in contact with the fluorescent coating, it emits white or near-white light. • Since the whole surface is the source of light, the emitted light gets intensified as compared to the ordinary bulb.

More Related