Very first microscope homework questions?

Questions:


1. What do you call the first microscope?


2. Who invented it?


3. Could you please help search a schematic diagram of this microscope?


4. Could you compare the first microscope with the Compound Light Microscope (CLM) in terms of its ability to magnify a specimen and the complexity in the designs of the two microscopes?





Thank you so much, I would really appreciate the help because the level of difficulty of my Science homeworks are constantly going uphill...|||1. Compound Microscope


2. Hans and Zacharias Janssen


3. http://micro.magnet.fsu.edu/primer/image鈥?/a>


4. Janssen's microscope consists of three draw tubes with lenses inserted into the ends of the flanking tubes. The eyepiece lens was bi-convex and the objective lens was plano-convex, a very advanced compound design for this time period. Focusing of this hand-held microscope was achieved by sliding the draw tube in or out while observing the sample. The Janssen microscope was capable of magnifying images approximately three times when fully closed and up to ten times when extended to the maximum. Whereas, A light microscope uses a beam of visible light to illuminate and contrast the object being viewed through the scope. The light source is typically an incandescent bulb which is turned on by a toggle switch at the side of the base. The beam of light shines up from a lamp in the microscope's base, through a hole or 鈥榳indow鈥?in the stage (area of the scope where the specimen sits), ultimately up through the specimen.