What is the purpose of ‘evolved Laser Interferometer Space Antenna (eLISA)’ project?

1. A. To detect neutrinos
2. B. To detect gravitational waves
3. C. To detect the effectiveness of missile defence system
4. D. To study the effect of solar flares on our communication systems

Answer: B

Explanation

eLISA is a spectacular plan of setting into space three spacecraft, a mother and two daughter spacecraft, which will fly in a triangular formation, trailing the earth in its orbit around the sun at a distance of over 50 million km. Laser interferometers will accurately measure changes in the distance between these cubes. If they should be affected by a gravitational wave, the minute changes in this distance are measure by the interferometer.