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An object is placed 30cm away from a con...

An object is placed 30cm away from a concave lens of focal length 15cm. Find the position, size and nature of the image.

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R G PUBLICATION-RAY OPTICS AND OPTICAL INSTRUCMENTS-EXERCISE
  1. Two lenses of powers +5D and - 3D are in contact: Find the focal lengt...

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  2. Deduce the relation 1/v-1/u=1/f for a concave lens.

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  3. An object is placed 30cm away from a concave lens of focal length 15cm...

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  4. Draw a ray diagram to show the formation of final image at least dista...

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  5. Draw a ray dioagram for the formation of an image by a reflecting tele...

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  6. Derive the expression for the equivalent focal length of a combination...

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  7. Deduce the relation 1/v-1/u=1/f for a concave lens.

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  8. What is astigmatism? How it can be removed?

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  9. A man stands on vertical tower of height 20m. Calculate the distance u...

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  10. Draw the ray diagram for the formation of image by a compound microsco...

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  11. The objective lens and eye piece lens of a Compound microscope have fo...

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  12. Establish the lens maker's formula for a biconvex lens.

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  13. Two identical equiconvex lenses of refractive index 3/2 and focal leng...

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  14. Draw the ray diagram to show the location of the principal focus of a ...

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  15. A square loop of side 3cm is placed 25 cm away from a Convex mirror of...

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  16. A convex lens and a Concave lens of focal length 0.1m each are placed ...

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  17. You are given a prism in which the two refracting surfaces are at 90^@...

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  18. You are given a prism in which the two refracting surfaces are at 90^@...

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  19. A miopic person uses a lens of power -1.25D. What is his farpoint?

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  20. "In between a fixed object and a fixed screen, a convex lens can cast ...

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