50 Important General Science Question and Answers 04 | santhoshnair.net

50 Important General Science Question and Answers 04

50 Important General Science Question and Answers 01

01. The Law of Photoelectric Effect was formulated by? - Albert Einstein
02. The working principle of solar cells? - Photoelectric Effect
03. When a ray of light falls on a smooth surface and returns to the same medium, it is called? - Reflection of light
04. An object which reflects all colours appears as? - White
05. An object which absorbs all colours appears as? - Black
06. The bending of light when a ray of light travels from one medium to another is called.? -  Refraction
07. Snell's law is related with? - Refraction
08. Twinkling of stars is due to? - Refraction of light
09. A pond looks shallow is due to? - Refraction of light
10. Stick appears to be bent, when immersed in water is due to? - Refraction of light
11. Early sunrise and late sunset are due to? - Refraction of light
12. Mirage is due to? - Refraction of light
13. Due to the change of medium, the phase velocity of the wave is changed but its frequency remains? - Constant
14. Fatamorgana is a term associated with? - Mirage
15. The measure of the optical density of the medium is? - Refractive index
16. Refractive index of a medium is calculated by? - The speed of light in vacuum/Speed of light in medium$
17. Refractive index of water is? - 1.33
18. Refractive index of a vacuum is? - 1
19. Refractive index of ice is? - 1.31
20. Refractive index of diamond is? - 2.42
21. The complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle is called Total Internal? - Reflection
22. The father of fibre optics? - Narendra Singh Kapani
23. Sparkling of diamond is due to? - Total Internal Reflection of light
24. The working principle of optical fibres is? - Total Internal Reflection
25. Glittering of water bubbles is due to? - Total Internal Reflection
26. The splitting up of light ray into different colours is called? - Dispersion
27. The dispersion was discovered by? - Sir Isaac Newton
28. Rainbow is formed due to? - Reflection, Refraction and Dispersion of light
29. Main principle due to the formation of the rainbow? - Dispersion
30. Rainbow is seen as a circle from? - Space
31. Rainbow is seen as semi-circle from? - Earth
32. A rainbow appears in the opposite direction of? - Light
33. Red colour angle in a rainbow? - 42.8°
34. Violet colour angle in a rainbow? - 40.8°
35. Colour at top of a rainbow is? - Red
36. Colour at bottom of a rainbow is? - Violet
37. Colour at the centre of a rainbow is? - Green
38. The phenomenon that occurs when two waves meet while travelling along the same medium? - Interference
39. Interference was observed first by? - Thomas Young
40. Different colour of the soap foam is due to? - Interference of light
41. Oil spread in water glitters due to? - Interference of light
42. The bending of light around the corners of an obstacle or aperture into the region of the geometrical shadow of the obstacle is called? - Diffraction
43. The fuzzy uneven edges of shadow can be explained by? - Diffraction of light
44. The principle behind the working of the projector in a film theatre can be explained by? - Diffraction of light
45. Fringes pattern in CD can be explained by? - Diffraction of light
46. The reflection of a ray from a straight path due to particles, or in the interface between two media is called? - Scattering of Light
47. Reddening of the sun at sunrise and sunset shadow can be explained by? - Scattering of light
48. The blue colour of the sky and sea can be explained with? - Scattering of light
49. Colour lamp used in the fog for vehicles is? - Yellow light
50. On the moon, the sky appears black colour due to the absence of? - Scattering of light


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