Physics general knowledge
Physics General Knowledge in English
1. Who was the first to calculate the speed of light
Answer: Romer
2. What is the speed of light in air or vacuum
Answer = 3×1000000000m/s
3. The speed of light is maximum in
Answer = in air and vacuum
4. How long does it take for sunlight to reach the earth?
Answer = 8 minutes 16.6 seconds
5. How long does it take for the reflected light from the Moon to reach the Earth?
Answer = 1.28 seconds
6. An object which is illuminated by its own light is called
Answer = Illuminated Objects
7. What is the speed of light in glass
Answer = 2×1000000000m/s
8. What is the speed of light in turpentine oil
Answer = 2.04×1000000000m/s
9. What is the speed of light in water
Answer = 2.25×1000000000m/s
10. What is the speed of light in rock salt
Answer = 1.96×1000000000m/s
11. What is the speed of light in nylon
Answer = 1.96×1000000000m/s
12. Which color of light is scattered the most?
Answer = Violet
13. Which color of light is least scattered?
Answer = red color
14. What is the phenomenon of light hitting the surface and coming back?
Answer = phenomenon of reflection
15. Who first gave the theory of wave of light?
16. Which lens should a person with nearsightedness use?
Answer = Concave lens
17. Which lens should a person with farsightedness use
Answer = Convex Lens
18. What is the phenomenon of red appearance at the time of rising and setting of the sun?
Answer = scattering of light
19. What is the phenomenon of diamond shining?
Answer = total internal reflection
20. Which fairy phenomenon is the bright appearance of a test tube lying in water and a bubble in water?
Answer = total internal reflection
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