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).
Related Reads A.A. Milne on Happiness and How Winnie-the-Pooh Was Born Return of the Pooh Finding Winnie: The Improbable and Touching Real-Life Story of the Baby Bear Who Inspired Winnie-the-Pooh