The document discusses two instruments that use light: the light bulb and the optical microscope. The light bulb was invented in 1879 by Thomas Edison and modern light bulbs use tungsten filaments instead of carbon. The optical microscope uses visible light and a system of lenses to magnify images of small objects.

1. Instruments that use light 
By Shannon Creighton

2. The light bulb
The electric light bulb is probably the most
famous instrument that uses light to be
invented! It was invented by American
inventor Thomas Edison 1879. Modern
day light bulbs haven't changed that much
since they were invented accept they use
filaments made of tungsten rather than
carbon of the 1800’s.

3. Optical microscope
The optical microscope (also referred to as
the light microscope) is a microscope that
uses visible light and a system of lenses to