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Physics Mcqs — Test 22

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Question 1
The blue colour of the sky is due to___________________?
Question 2
When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?
Question 3
Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?
Question 4
Electrical energy is measured in___________________?
Question 5
Electrical energy is converted to heat at the rate of___________________?
Question 6
A fuse is placed in series with the circuit to protect against__________________?
Question 7
Which one of the following bulbs has the least resistance ?
Question 8
Optical active crystals rotates the __________________?
Question 9
In double slit experiment we observe _____________________?
Question 10
Which one of the following properties of light does not change with the nature of the medium ?