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Define the principal focus of a concave ...

Define the principal focus of a concave mirror.

A

real

B

Virtual

C

undefined

D

at the pole

Text Solution

Verified by Experts

The correct Answer is:
B
Virtual
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AGRAWAL EXAM CART BIHAR-REFLECTION OF LIGHT, MULTIPLE REFLECTION AND HUMAN EYE AND ITS CARE-IMPORTANT QUESTIONS
  1. Image formed by plane mirror is :

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  2. The geometrical centre of surface of spherical mirror is called its

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  3. Define the principal focus of a concave mirror.

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  4. The splitting of light into its component colors is called :

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  5. Radius of curvature of a concave mirror is always ........ to the mirr...

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  6. The mirror used by dentists to concentrate light on the tooth to be ex...

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  7. An object is placed 1.5m from a plane mirror. How far is the image fro...

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  8. A drop of water appears like pear due to:

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  9. The radius of curvature of a plane mirror

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  10. Which one among the following is used to make periscope?

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  11. Which mirror has a wider field of view ?

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  12. Explain why, a ray of light passing through the centre of curvature of...

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  13. Arranging in the ascending order of wave length, which one is true?

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  14. In a transparent medium, the velocity........ light is the least.

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  15. Pigments are mixed according to ..... method.

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  16. A change in the focal length of the eye lens is brought by.

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  17. In the spectrum of visible light which colour of light deviates the ma...

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  18. "…....................." light is deviated the maximum in the spectrum...

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  19. What are that number of primary colours ?

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  20. What are that number of primary colours ?

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