The equation of a certain progressive transverse wave is y = 2 sin 2 \(\pi ( \frac{t}{0.01} - \frac{x}{30})\), where x and y are in cm and t in seconds. Calculate the period of the wave.
Images formed by a convex mirror are always
The refractive index of a material is 1.5. Calculate the critical angle at the glass-air interface
A diverging lens of focal length 30cm produces an image 20cm from the lens. Determine the object distance
