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What is Laser?...

What is Laser?

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JBD PUBLICATION-PHYSICAL WORLD AND MEASUREMENT-EXAMPLE
  1. Name a unit which can be used to measure very small mass.

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  2. How many kilograms are contained in (i) 1 amu and (ii) 1 slug?

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  3. What is Laser?

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  4. Define amu.

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  5. Define a second in terms of vibrations of caisium -133 atom.

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  6. An observer takes 10 observations in an experiment .I he repeats the s...

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  7. Round off the folowing number (i)7.250 to two digits

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  8. Round off the folowing number (ii) 9.350 to two digits

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  9. Round off the folowing number (iii)0.89991 to two digits

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  10. Round off the folowing number (iv) 12.853 to three digits.

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  11. Round off the folowing number (v) 6.993 xx 10^4 to three digits.

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  12. Solve with due regard to significant figure(12.4-12.21)^(1/2).

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  13. Weight of a body is 6.34 g and its volume is 1.7 cm^3.Wha will be the ...

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  14. If the error in the measurement of radius of a sphere is 3%,then what ...

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  15. Which of the following is the most precise device for measuring length...

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  16. Which of the following is the most precise device for measuring length...

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  17. Which of the following is the most precise device for measuring length...

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  18. What is the number of significnt figures in 0.00680?

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  19. Are all constants dimensioneless?Give examples in your support.

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  20. What are dimensions of energy density?

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