Biology Question Bank For Highschool
(b) fa c2 (d) zero 43. The most important characteristic of electron in the production of X-rays is (a) charge of electron (b) mass of electron (c) revolution of electron around the nucleus (d) speed of electron 44. 450 (a) (c) The energy of a photon of light of wavelength nm is 4.4 x 10'' 9 J (b) 2.5 x l o M 9 J 17 K25 x 10~ J (d) 2.5 x 10-'7 ...
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