MCQ
Dispersion can take place for
- ATransverse waves only but not for longitudinal waves
- BLongitudinal waves only but not for transverse waves
- ✓Both transverse and longitudinal waves
- DNeither transverse nor longitudinal waves
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$(I)$ All radioactive elements decay exponentially with time
$(II)$ Half life time of a radioactive element is time required for one half of the radioactive atoms to disintegrate
$(III)$ Age of earth can be determined with the help of radioactive dating
$(IV)$ Half life time of a radioactive element is $50\%$ of its average life periodSelect correct answer using the codes given belowCodes :