The energy that is needed to make an electron jump from the valence band to the conduction band is called the âenergy gapâ. In a macroscopic piece of matter it is the equivalent of the excitation energy from the ground state to the first excited level in free atoms. Hope that was unerstandableâ¦.
He was created by A.A. Milne. The first collection of stories about the bear was the book Winnie-the-Pooh (1926) and this was followed by The House at Pooh Corner (1928). Milne also included a poem about the bear in When We Were Very Young (1924) and many more in Now We Are Six (1927).
Who Invented Pong? One of the earliest forms of arcade video games, Pong is a two-dimensional tennis game. The primary aim of the game is to beat opponents by scoring higher. Released in 1972, this important development eventually led to a boom in the video game industry. With its rich and colorful history, it is but great to take a quick look at the start of this early video game form including who invented Pong. The Invention of Pong.