Vibration in strings Waves travels aloog a horizontal rope fixed at one end, and the other end is free to […]
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(A) WIND INSTRUMENTS Clarinets, flute, saxophone, trumpet are examples of wind musical instruments. A musical note originates from a source […]
PRODUCTION Sound waves are produced by vibrating objects. Some of the source of sound are talking, shouting, beating, beating drums, […]
White light has a band of wavelengths of different colours. This is called the spectrum colours. Red light has the […]
THE COMPOUND MICROSCOPE The compound microscope produces a greater magnification than the simple microscope. It has two lenses, the objective […]
LENSES: Lenses are used as magnifying glasses. They are also used in microscopes, telescopes, cameras and projectors. The human eye […]
Refraction Through Triangular Prism When a ray of light passes through a triangular prism, it is refracted as shown below […]
REFRACTION There is a change in the direction and speed of a ray of light when it passes from medium […]
When a shell of a hollow sphere of glass is made out of a piece of glass and then silvered, […]
REFLECTION OF LIGHT ON PLANE SURFACE There are two types of reflection: 1. Regular Reflection 2. Diffuse Reflection or Irregular […]