Consider the electromagnetic radiations having wavelengths 200 nm, 500 nm and 1000 nm. Which wavelength (s) of the following can make visual sensation to a human eye?
A) 200 nm and 500 nm
B) 500 nm and 1000 nm
C) 500 nm only
D) 200 nm and 1000 nm
Answer: C) 500 nm only
Explanation:
Visual image of human eye is 390-700 nanometer. So, approximate value is 500 nanometer only.
Due to an acceleration of 1 , the velocity of a body increases from 5 m/s to 10 m/s in a certain period. Find the displacement (in m) of the body in that period.
A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.
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