How to make USB LED LIGHT, Life Hacks, LED Light Life Hacks, Life Hacks for LED Light, DIY, #Shorts

In LED visible light is produced by

How many light years make 1 par sec ?

A LED emits visible white light when its

The schematic symbol of light emitting diode (LED) is

Rohan was studying in a science college and was staying with his grand father. One day, the old torch which was being used by Rohan's grand father stopped wirking. He asked Rohan to purchase a new torch for him. Rohan himself made a torch using LED with a small recharge battery and gave it to his grand father as a gift. Rohan explained the advantages of LED over a bulb. Rohan's grand father was very happly. Read the above passage and answer the following question: (i) What is LED ? Name the two materials used in making LED, whose light falls in the visible region. (ii) Why LED is a better choice than a bulb in torch? (iii) What do you think about the attitude of Rohan towards his grand father?

In LED, intensity of emitted light

How many kilometres make 1 light year ?

Light-emitting diode (LED) converts