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Define the principal focus of a lens....

Define the principal focus of a lens.

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Define the principal focus of a spherical mirror.

Define the principal focus of a concave mirror.

An object is placed at a distance x_1 from the principal focus of a lens and its real image is formed at a distance x_2 from the another principal focus. The focal length of the lens is

a) Explain with the help of a diagram, why the concave lens is also called a diverging lens. b) Define the principle focus of a convex lens.

Define principal focus.

Principal focus of concave lens:

MBD -HARYANA BOARD-LIGHT:REFLECTION AND REFRACTION-EXAMPLE
  1. Define the terms: concave mirror convex mirror

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  2. APERTURE

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  3. Define the principal focus of a lens.

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  4. Define the focal length of a spherical mirror.

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  5. The image of an object is formed at infinite distance from a concave m...

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  6. Where should an object be placed so that its real and same size image ...

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  7. Which mirror is used as a shaving mirror and why ?

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  8. Which mirror always forms virtual and erect image which is smaller tha...

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  9. Which mirror has a wider field of view ?

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  10. What is the basic difference between a concave mirror and a convex mir...

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  11. How will you distinguish between a plane mirror, a convex mirror and a...

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  12. What is magnification?

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  13. Give the characteristics of image formed by a plane mirror.

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  14. Give three basic differences between real image and virtual image.

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  15. Explain with the help of a diagram the formation of image formed by a ...

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  16. What are the uses of concave and convex mirrors ?

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  17. What are cartesian sign conventions used in spherical mirror ? What is...

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  18. A ray of light travelling in glass emerges into air. State whether it ...

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  19. What is a lens ?

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  20. What is the basic difference between reflection and refraction of ligh...

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