MCQ
Huygen's wave theory allows us to know:
- AThe wavelength of the wave.
- BThe velocity of the wave.
- CThe amplitude of the wave.
- ✓The propagation of the wave front.
Huygen's wave theory explain the propagation of the wave front.
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| $\lambda(\mu \mathrm{m})$ | $V_0$ (Volt) |
| $0.3$ | $2.0$ |
| $0.4$ | $1.0$ |
| $0.5$ | $0.4$ |
Given that $c=3 \times 10^8 \mathrm{~m} \mathrm{~s}^{-1}$ and $e=1.6 \times 10^{-19} \mathrm{C}$, Planck's constant (in units of $\mathrm{J}$ s) found from such an experiment is

