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Can light travel in vacuum ? If yes, wit...

Can light travel in vacuum ? If yes, with what speed ?

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Yes, `3 xx 10^(8) m//s`.
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PRADEEP-REFLECTION AND REFRACTION-Additional Question
  1. The range of wavelength of the visible light is

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  2. Which colour of the light has the longest wavelength?

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  3. Can light travel in vacuum ? If yes, with what speed ?

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  4. What is the speed of light in air ?

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  5. What is a ray light ?

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  6. Name the best reflector of light.

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  7. On what factors does the focal length of a spherical mirror depend ?

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  8. Do the laws of reflection change, when we use a spherical mirror inste...

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  9. Complete the following ray diagrams. State the size and nature of imag...

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  10. Can an object be virtual ?

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  11. Can a real image be taken on a screen ?

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  12. Do lights rays actually pass through a real image ?

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  13. Do lights rays actually pass through a virtual image ?

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  14. How do you draw normal to a spherical mirror at a particular point?

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  15. Which of the mirrors is diverging: concave or convex?

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  16. Which of the mirrors is converging: concave or convex?

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  17. What is the relation between focal length and radius of curvature of a...

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  18. (a) The magnification of a concave mirror is - 1. What is the position...

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  19. What is the ratio of object distance to image distance in case of a co...

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  20. The focal length of a convex mirror is 12.5 cm. How far is it centre o...

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