From cable to wireless the telephone has evolved to respond to our modern mobile lifestyle. The original concept of voice transmission was simply by mechanical vibrations e.g. a string can 'phone', whereas later scientific advances in electromagnetic sound transmitters and receivers enabled the application of this emerging science to a practical telephone patented by Bell in 1876.
- the application of science to solving problems and inventing a new product that can then be tested as fit for purpose.
These resources were developed by the Royal Institution for their 2014 Christmas Lectures.