Core sub phy_att_15laser

Do you like this show?YES.Can you know about this rays?YES,We know about laser rays.

TO DAY WE ARE DISCUSSING ABOUT LASER RAYS.

THESE RAYS ARE USED IN MANY AREAS, LIKE

INDUSTRIAL,SCIENCE&TECHNOLOGY,MEDICINE,DEFENCE AND SPACE SCIENCE ECT.

LASER

1.INTRODUCTION.

2.ABBREVATION OF LASER.

3.TYPES OF LASER.

4.APPLICATIONS OF LASERS.

The basic scientific principle behind a laser was first put forward by DR. charles H.townes in 1954. The efforts of several scientists laser led to the development of the first laser called pulsed laser in 1960.

VARIOUS TYPES OF LASERS ARE NOW IN OPERATION WHICH CAN BE BROADLY CLASSIFIED INTO:

SOLID STATE LASERS

EX: RUBY LASER

LIQUID AND DYE LASERS

GASEOUS LASERS

EX:HE-NE LASER

1.LASERS HELPED IN UNDERSTANDING AND OFFERING CLARIFICATIONS FOR MANY BASIC PROBLEMS OF SCIENCE AND TECHNOLOGY

2.WITH THE HELP OF HE-NE LASER,IT WAS PROVED THAT THE VELOCITY OF LIGHT IS SOME IN ALL DIRECTIONS.

3.IN ASTRONOMY, LASERS HELPED IN EXTENDING THE DISTANCE OF OBSERVATION OF STELLAR OBJECTS AND STUDY THEIR NATURE.

THE COUNTING OF ATOMS IN A SUBSTANCE BECAME POSSIBLE BECAUSE OF LASER.

IN COMPUTERS, LASERS ARE USED TO RETRIEVE STORED INFORMATION FORM A COMPACT DISC(CD)

LASERS ARE USED IN FIBRE-OPTIC ENDOSCOPETO DETECT ULCERS IN THE INTESTINES.

LASERS ARE USED FOR BLOODLESS SURGERY.

Lasers are used extensively in the treatment of eye-diseases,particularly to reattach a detached retina.

The liver and lung diseases could be treated by lasers.

LASERS ARE USED NOW FOR CUTTING, DRILLING AND WELDING OF METALS AND OTHER MATERIALS.

LASER LIGHT IS USED TO COLLECT THE INFORMATION ABOUT THE PREFIXED PRICES OF VARIOUS PRODUCTS IN SHOPS AND BUSINESS ESTABLISHMENTS FROM THE BAR-CODE PRINTED ON THE PRODUCT.

LASER ARE USED IN SPACE COMMUNICATION, IN RADARS AND IN SATELLITES.

LASERS ARE USED IN VARIOUS GUIDED MISSILES AND ALSO FOR DETECTION OF ENEMY TARGETS.

NOWADAYS, A STUDENT CAN FLY A PLANE WITH THE HELP OF LASER RAYS. MAN HAS INVENTED TO FLY A PLANE WITHOUT USING ANY FUAL. LASER IS USEFUL TO MANKIND IN MANY WAYS. IN FUTURE, MANY UNBELIEVABLE THINGS ARE GOING TO HAPPEN WITH THE USE OF LASER RAYS.