A spherical cupper particle has about 125 atoms.If the atomic radius of copper is 110pm ( 1pm=10^(-12)m the diameter of the particle is close to the wavelength of
1.green light.
2.electron beam of energy 1.1eV. times
3. sound waves of frequency 310Hz travelling in air at room temperature. 4.x-rays of energ 12.10keV.
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1132 rays are there I hope it
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