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30 kV इलेक्ट्रानों के द्वारा उत्पन्न X - किरणों की उच्चतम आवृत्ति प्राप्त कीजिए ।

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30 kV इलेक्ट्रानों के द्वारा उत्पन्न X - किरणों की उच्चतम आवृत्ति प्राप्त कीजिए ।
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सूत्र `hv_("max")=eV`
या `" "v_("max")=(eV)/(h)=(1.6xx10^(-19)xx30xx10^(3))/(6.63xx10^(-34))`
`=7.24xx10^(18)Hz.`
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