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Why does the Sun visible before the actu...

Why does the Sun visible before the actual sunrise and sunset look reddish from the Earth ?

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We can see the sun before the actual sunrise by about :

The sun is visible a little before the actual sunrise because of which one of the following?

Fill in the following blanks with suitable words : We can see the sun about………..minutes before the actual sunrise and about……..minutes after the actual sunset because of atmospheric……….

The sun looks reddish at the time of sunrise and sunset.

The sun looks reddish at the time of sunrise and sunset.

MODERN PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-Revision Exercises (Short Answer Questions)
  1. Two monochromatic rays of light are incident normally on the face AB o...

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  2. Obtain an expression for the combined focal length for two thin convex...

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  3. लेंस समीकरण (1)/(v) -(1)/(u) =(1)/(f) की सहायता से दर्शाइए कि अवतल ल...

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  4. A ray of light falling at an angle of 50^@ is refracted through a pris...

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  5. How does angle of deviation vary with the angle of incidence in case o...

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  6. Sky appears blue in colour. Explain.

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  7. Why does the sun appear red at sunset ?

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  8. Why does the Sun visible before the actual sunrise and sunset look red...

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  9. Why is there no dispersion of light refracted through a rectangular gl...

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  10. Eye is more sensitive to yellow colour but danger signals are made wit...

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  11. A convex lens of focal length 20 cm and a concave lens of focal length...

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  12. What is hypermetropia (far-sightedness) ? What are its causes ? How ca...

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  13. Calculate the radius of the curvature an equi-concave lens refrective ...

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  14. An equilateral glass prism has a refrective index 1.6 in air. Calculat...

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

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  16. Draw a ray diagram for the formation of image by a compound microscope...

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  17. Objective of a compound microscope should have small focal length. Why...

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  18. Draw a schematic ray diagram of reflecting telescope showing how...

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  19. अपवर्ती दूरदर्शी का नामांकित किरण आरेख खीचिए | इसकी आवर्धन क्षमता को प...

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  20. (a) Show using a proper diagram how unpolarised light can be linearly...

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