Green Revolution is a crucial step in the progress of agricultural practices, especially in developing countries. It focuses on increased food production through modern techniques such as the use of high-yielding variety seeds, chemical fertilizers, and advanced irrigation methods. This revolution has significantly contributed to food security and alleviated poverty in many regions. However, it also poses environmental challenges due to over-reliance on chemical fertilizers and pesticides. Thus, it is important to embrace sustainable agricultural practices alongside these innovations to ensure long-term benefits for society and the environment.
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 ___________.