MCQ
Why does light travel as a wave?
- ADue to the small packets called photons.
- BDue to an electric field.
- CLight does not travel as a wave.
- ✓Due to its electromagnetic nature.
Light travels as a wave due to its electromagnetic nature. This is further facilitated by Maxwell’s equations which states that changing magnetic fields give rise to electric fields and changing electric fields give rise to magnetic fields.
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| Column $- I$ | Column $- II$ |
| $(A)$ Drift Velocity | $(P)$ $\frac{m}{n e^{2} \rho}$ |
| $(B)$ Electrical Resistivity | $(Q)$ $\mathrm{ne} v_{\mathrm{d}}$ |
| $(C)$ Relaxation Period | $(R)$ $\frac{\mathrm{eE}}{\mathrm{m}} \tau$ |
| $(D)$ Current Density | $(S)$ $\frac{E}{J}$ |

