electron optic
(a branch of electronics that deals with those properties of beams of electrons that are analogous to the properties of rays of light) इलेक्ट्रॉन प्रकाशिकी
(a branch of electronics that deals with those properties of beams of electrons that are analogous to the properties of rays of light) इलेक्ट्रॉन प्रकाशिकी
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