CBSE Class 12-science - Optical Instruments Videos

• Optical instrument
  
• derive the expression for the magnifying Power and the length of a compound microscope using two convex lenses.
• derive an expression for the magnifying power of an astronomical telescope in normal adjustment?
• Define and write expression for magnifying power of an astronomical telescope in normal adjustment (i,e, when the final image is formed at infinity)  
• Find the maximum magnifying power of a compound microscope having a 25 diopter lens as the objective, a 5 diopter lens as the eyepiece and the separation 30 cm between the two lenses. The least distance for clear vision is 25 cm.
• the magniuifying power of a telescope is 9. when it adjusted for parallel rays the didtance b/w the eye piece and  objective lens is 20cm find the focal length of both lenses
• which mirror does used in microscope and why?
• Is combination of a mirror and lens in syllabus of class 12? 
• Derivation of compound microscope
• astronomical telesccope  with full explaination

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