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).
The little boy who talks to the animals in the Winnie-the-Pooh stories is called Christopher Robin, which is the name of A. A. Milne's real-life son, who was born in 1920. On August 21, 1921, the real-life Christopher Robin Milne received a stuffed bear from Harrods for his first birthday, which he named Edward Bear.