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wavelength emitted by an atom of atomic number Z =11 is Find the atomic number for an atom that emits radiation with wavelength
(a)Z = 6
(b)Z = 4
(c)Z =11
(d)Z = 44

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Important Questions on Atomic Physics
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A student is jogging on a straight path with the speed per hour. Perpendicular to the path is kept a pipe with its opening from the road (see figure). Diameter of the pipe is At the other end of the pipe is a speaker emitting sound of towards the opening of the pipes. As the student passes in front of the pipe, she hears the speaker sound for seconds. is in the range (take speed of sound, ):

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