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Class 12
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Physics
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Ray Optics and Optical Instruments
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Optical Instruments : Microscope
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Magnifying Glass
Magnifying Glass
3 Mins
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QUICK SUMMARY WITH STORIES
Refraction By Lens
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Important Questions
Draw a ray diagram of compound microscope, when final image is formed at the minimum distance of distinct vision.
Easy
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Describe the construction of a compound microscope. Derive an expression for its total magnification. Draw a ray diagram for the formation of image by a compound microscope.
Hard
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Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
Medium
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Define the magnifying power of a compound microscope when the final image is formed at infinity. Why must both the objective and the eyepiece of a compound microscope have short focal lengths? Explain.
Medium
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If the focal length of objective and eye lens are 1.2 cm and 3 cm respectively and the object is put 1.25 cm away from the objective lens and the final image is formed at infinity. The magnifying power of the microscope is :
Medium
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Draw a labelled diagram of an image formed by a compound microscope, with the image at least distance of distinct vision. Write any one expression for its magnifying power.
Medium
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A simple microscope has a focal length of 5cm. The magnification at the least distance of distinct vision is
Easy
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The power of plane mirror is ____
Easy
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In a compound microscope the focal length of objective lens.
Easy
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The focal length of a convex lens is 10 cm. The magnifying powers when it is used as a magnifying glass to form the image at (i) near point and (ii) far point are :
Medium
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