Draw a labelled ray-diagram for a simple microscope (magnifying glass) and deduce an expression for its angular magnification in normal use.
Important Questions on Optical Instruments
Draw a neat labelled ray diagram showing the formation of an image at the least distance of distinct vision by a simple microscope. When the final image is at , derive an expression for its magnifying power at .
Draw a labelled ray-diagram of an image formed by a compound microscope when the final image lies at least distance of distinct vision. Write any one expression for its magnifying power. Why is its objective of a very small aperture?
With the help of a labelled diagram, explain the construction and working of a compound microscope. Derive an expression for its magnifying power. How can the magnifying power be increased?
Draw a ray-diagram of an astronomical telescope and derive an expression for its magnifying power when the image is formed at infinity.
Draw a labelled ray diagram of an image formed by a refracting telescope with final image formed at infinity Derive an expression for its magnifying power with the final image at infinity.
Draw the ray-diagram for the formation of image by a refracting telescope having the final image formed at infinity Define the angular magnification and derive the formula for the same for image formed at infinity.
Derive the general relation for the magnifying power of an astronomical telescope when image is formed at infinity State any one advantage of an astronomical telescope of the reflecting type over a refracting type.
