Question

List the different gadgets and instruments mentioned in the passage. Find more information about at least 3 of them ,using the internet.

Answer 1

Explanation:

light bulb:-Thomas Edison invented the first consistent and commercially applicable light bulb in 1879. It created a revolution as it changed the way man used light. Electric lights became cheap and convenient to use and were safe too. Earlier,a carbon filament and vacuum was used.Later, it was replaced by tungsten and inert gasses. Nowadays,the LED and fluorescent bulb have replaced the traditional bulbs.Attempts are being made to make it more cost effective and efficient

Answer 2

ANSWER: This is a answer.......