If the focal length of a concave lens is 2 m, then the power of the lens is
2 dioptre
1dioptre
0.5 dioptre
- 0.5 dioptre
Additional Questions
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The maximum temperature in a city on 7 days of a certain week was 34.8°C, 38.5°C,33.4°C, 34.7°C, 35.8°C, 32.8°C, 34.3°C. Find the mean temperature for the week |
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A group of 100 candidates have their average height 163.8 cm with coefficient of variation 3.2. What is the standard deviation of their heights? |
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The present ages of Reena and Usha are 24 years and 36 years respectively what |
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Simplify (33)-2 X (22)-3 / (24)-2 X 3-4 X 4-2 |
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The total surface area of cube is 384 m2. Find the side of the cube |
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Find the LCM of 3(a-1), 2 (a-1)2 , (a2 -1) |
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Find the cube root of 1(61/64) |
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The ratios of the respective heights and the respective radii of two cylinders are 1 : 2 and 2 : 1 respectively. Then their respective volumes are in the ratio. |
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At what rate of interest a sum of money doubles itself in 10 years in simple interest? |
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In a Geometric progression t2 = 3/5;t3 = 1/5 Then the common ratio is |
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