MCQ
The earth’s magnetic field always has a vertical component except at the:
- ✓Magnetic equator.
- BMagnetic poles.
- CGeographic north pole.
- DLatitude $45^\circ .$
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$(A)$ $\beta_2>\beta_1$
$(B)$ $m_1>m_2$
$(C)$ From the central maximum, $3^{\text {rd }}$ maximum of $\lambda_2$ overlaps with $5^{\text {th }}$ minimum of $\lambda_1$
$(D)$ The angular separation of fringes for $\lambda_1$ is greater than $\lambda_2$