So far we have only considered sound in isolation and we have seen that sound has velocity, frequency, wavelength and reduces in intensity in proportion to the square of the distance from the source.

Here, you will get the CBSE Class 9 Science, Sound: Chapter notes (Part-I). These chapter notes are prepared by the subject experts and cover every important topic from the chapter. You get a crisp ...

Ever noticed how a certain song can instantly transport you back in time? Or how the sound of rain can shift your entire mood? So why not harness the power of sound to create deeper, more meaningful ...

To investigate the reflection of light by a plane mirror.

Properties of waves - OCR Gateway Properties, uses and hazards of electromagnetic waves - OCR Gateway Lenses and ray diagrams - OCR Gateway Light - OCR Gateway Sample exam questions - waves in matter ...