From this App you can learn:

Observe and explore optical instruments that are available in daily life.
Investigate the characteristics of human eye and probe the reasons for the cause of vision defects.
Distinguish between simple and compound microscope based on their characteristics of magnifying a given object.
Explore how we can image a cosmic object using a telescope and discuss various types of telescopes.
Explore the concept of holography and its applications in everyday science based on its characteristics.
Discover the working of binoculars, cameras, periscopes based on simple principles of refraction and reflection.

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This topic covers under Chemistry subject as a part of the Waves And Optics topic
and this topic contains following sub topics
Optical Instruments
Microscopes
Telescope
Binoculars
Holography