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11. Dual nature of radiation and matter — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics11. Dual nature of radiation and matter1 Mark
MCQ
Frequency of photon having energy $66 eV$ is
  • A
    $8 \times {10^{ - 15}}Hz$
  • B
    $12 \times {10^{ - 15}}Hz$
  • ✓
    $16 \times {10^{15}}Hz$
  • D
    None of these
✓

Answer

Correct option: C.
$16 \times {10^{15}}Hz$
c
(c) $E = h\nu$

$\Rightarrow \nu = \frac{E}{h} = \frac{{66 \times 1.6 \times {{10}^{ - 19}}}}{{6.6 \times {{10}^{ - 34}}}}$

$ = 16 \times {10^{15}}Hz$

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