4.5 x 1010Hz
5 x 109Hz
4.5 x 108Hz
2 x 107Hz
2 x 106Hz
Correct answer is E
V=fλ,f=vλ=3×108150⇒2×106Hz
The refractive index of liquid is 1.5. If the velocity of light in vacuum is 3.0 x 108ms-1, the velo...
A missile is launched with a speed of 75 ms-1 at an angle of 22° above the surface of a warship....
When some ice cubes are added to a glass of warm water, the glass is cooled by a process of ...
A well-lagged bar of length 100cm has its ends maintained at 100oC and 40oC respectively. What is th...
A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field B in the ...
A car of mass 1500 kg goes round a circular curve of radius 50m at a speed of 40 ms-1. The magnitude...
The diagram above shows a closed side 0.5m in a uniform electric field E in the direction shown by t...
A planet has mass, M, and radius R, If the universal gravitational constant is G, what is the expres...
A body of mass 20g projected vertically upwards in vacuum returns to the point of projection after 1...
One of the conditions necessary for an object to be in equilibrium when acted upon by a number of pa...
Numerical Reasoning Questions and Answers
Spatial Reasoning Questions and Answers
Situational Judgement Questions and Answers
Verbal Reasoning Questions and Answers
Quantitative Reasoning Questions and Answers
Microsoft Office Questions and Answers
Personality Test
Puzzles Questions and Answers
Typing Speed and Accuracy Test
Data Interpretation Questions and Answers
Nigeria General Knowledge Questions and Answers
Abstract Reasoning Questions and Answers
Logical Reasoning Questions and Answers
See all →