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A physical quantity is a quantity that can be measured. A physical quantity can be divided into base quantity and derived quantity. Base quantities are the quantities that are conventionally accepted as functionally independent of one another. It is a quantity that cannot be defined in term of other physical quantity.

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CERTIFICATEThis is to certify that Siddhant Sethi of class XII D has worked under my supervision on the project CALCULATION OF THE VALUE OF PLANCKS CONSTANT USING LED in physics laboratory and completed it to my total satisfaction. Date: (Ms. Suman) ACKNOWLEDGEMENTIt gives me immense pleasure to express my deep sense of gratitude towards my eminent physics teacher Mrs. Suman who has always been there as guiding spirit behind the successful completion of the project. I am also grateful to our Lab Assistant Mr. MN Singh for his valuable guidance and encouragement throughout the course and preparation of this project. (Siddhant Sethi)INDEXS.No.TOPICPAGE 1.)AIM4 2.)INTRODUCTION5 3.)THEORY6 4.)REQUIREMENTS10 5.)PROCEDURE11 6.)OBSERVATIONS12 7.)CONCLUSION13 8.)PHOTO GALLERY14 9.)BIBLIOGRAPHY15 AIM: To measure Planck's constant using light-emitting diodes using the turn on voltage. INTRODUCTIONLight-emitting diodeRed, green and blue LEDs of the 5mm typeInventedNick Holonyak Jr. (1962)Electronic symbol:Light-emitting diodes (LEDs) convert electrical energy into light energy. They emit radiation (photons) of visible wavelengths whe

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