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).
âScarecrow (1939) The Scarecrow is a fictional character invented by L. Frank Baum, author and creator of the Oz legacy. He is first introduced in Baum's first Oz book titled The Wonderful Wizard of Oz, published in 1900. He makes his debut appearance in the third chapter of the novel titled How Dorothy Saved the Scarecrow.