Physics Measurements and Experimentation Numerical1a
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Numericals
Q1 The wavelength of light of a particular colour is 5800 Å. Express it in (a) nanometer and (b) metre
Q2 The size of a bacteria is 1 µ. Find the number of bacteria in 1m length.
Q3 The distance of a galaxy from the earth is 5.6 x 1025m. Assuming the speed of light to be 3 x 108 ms-1 find the time taken by light to travel this distance.
Q4 The wavelength of light is 589nm. What is its wavelength in Å?
Q5 The mass of an oxygen atom is 16.00 u. Find its mass in kg.
Q6 It takes time 8 min for light to reach from the sun to the earth surface. If speed of light is taken to be 3 x 108 ms-1 , find the distance from the sun to the earth in km.
Q7 ‘The distance of a star from the earth is 8.33 light minutes’. What do you mean by this statement? Express the distance in metre.
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