Exercise, 10th Sci. 1, 6. Refraction of light

                

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आपल्या विज्ञान विषयाच्या माहितीसाठी खालील लिंकला स्पर्श करा.

माहिती विज्ञानाची 🎷

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1. ..... light has the smallest wavelength, close to 400  nm.

2. Refractive index of air is ......  .

3. Define- refraction of light.

4. Have you seen that objects beyond and above a holi fire appear to be shaking? Why does this happen?

5. The absolute refractive index of water is 1.33. What is the velocity of light in water?

(velocity of light in vacuum 3 x 10 ⁸ m/s)

6. ....  is the combined effect of dispersion, refraction and total internal reflection of light.

7. .....  was the first person to use a glass prism to obtain Sun’s spectrum.

8. Write  Laws of refraction.

9. What is meant by reflection of light?

10. The wavelength of radiation to which our eyes are sensitive is between ..... and ...... nm.

11. Define - Total internal reflection.

12. Light travels with a velocity 1.5 x 10 ⁸ m/s in a medium. On entering second medium its velocity becomes 0.25 x 10 ⁸ m/s. What is the refractive index of the

second medium with respect to the first medium?

13. When white light is incident on the prism, different colours bend through different angles. Among the seven colours, ..... bends the least while ..... bends the most.

14. When a light ray is incident ....... at the boundary between two media, it does not

change its direction and hence does not get refracted.

15. What are the laws of reflection?

16. Refractive index depends on the velocity of light in the medium. Write true or false.

17. The red light has maximum wavelength i.e. close to ..... nm. 

18. Draw fig. of Dispersion of light.

19. If an opaque object lies in lights path, a ..... of the object is formed.

20. Draw fig. of Refraction of light passing through a glass slab.

21. Define - dispersion of light.

22. Will light travel through a glass slab with the same velocity as it travels in air?

23. When a light ray passes from a denser medium to a rarer medium, it bends ...... 

from the normal.

24. sin i / sin r = ?

25. From incident white light how will you obtain white emergent light by making use of two prisms?

26. Will the velocity of light be same in all media?

27. When a light ray passes from a rarer medium to a denser a medium, it bends towards the ......  . 

28. The light rays coming from a distant object appear to be coming from the image of the object inside the ground  is called a ........ .

29. Define - partial reflection.

30. Refractive index of Diamond is ....... .

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वरील काही शब्दांना  गुगल लिंक आहे, त्या शब्दांबद्दल जास्तीची माहिती हवी असेल तर त्या शब्दांना स्पर्श करावा.

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गरज भागविण्या इतकी 

असेल तर

 स्वतः ला श्रीमंत समजा. 

कारण श्रीमंतीची व्याख्या 

आजपर्यंत कुणालाच करता आली नाही.*   

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