MCQ
Wavefront of a wave has direction with wave motion
- AParallel
- ✓Perpendicular
- COpposite
- DAt an angle of $\theta$
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| List $I$ (Spectral Lines of Hydrogen for transitions from) | List $II$ (Wavelengths ($nm$)) |
| $A$ $n_2=3 \text { to } n_1=2$ | $I$ $410.2$ |
| $B$ $n_2=4 \text { to } n_1=2$ | $II$ $434.1$ |
| $C$ $n_2=5 \text { to } n_1=2$ | $III$ $656.3$ |
| $D$ $n_2=6 \text { to } n_1=2$ | $IV$ $486.1$ |
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