51. What is the range of Strong Nuclear force?
52. Name the process of production of energy in the Sun
53. Which type of reaction produces the most harmful radiation ?
54. Energy is continuously created in the sun due to:
55. The mass defect is the result of what action occurring?
56. Which one of the following wavelengths of light is most effective in photosynthesis ?
57. The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is
58. An electron microscope gives higher magnification than an optical microscope, because :
59. The magnifying power of an astronomical telescope can be decreased by
60. The light rays used for eliminating bacteria is
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