Interhalogen compounds are molecules formed by the combination of two different halogens.
These compounds have the general formula \( AB_x \), where \( x = 1, 3, 5, 7 \).
The reaction of chlorine with dry slaked lime \( \text{Ca(OH)}_2 \) produces bleaching powder: \[ \text{Ca(OH)}_2 + Cl_2 \rightarrow \text{CaOCl}_2 + H_2O \]
Explain the construction of a spherical wavefront by using Huygens' principle.
The slope of the tangent to the curve \( x = \sin\theta \) and \( y = \cos 2\theta \) at \( \theta = \frac{\pi}{6} \) is ___________.