| Consider the following statements about Very Long Baseline Interferometry (VLBI): |
| 1. It is a type of astronomical interferometry used in radio astronomy. |
| 2. It allows observations of an object that are made simultaneously by many telescopes to be combined, emulating a telescope with a size equal to the maximum separation between the telescope. |
| 3. It is used in the measurement of gravitational forces of the Sun and Moon on the Earth and deep structure of the Earth. Which of the statements) given above is/are correct? |
A) Only 1
B) 2 and 3
C) 1 and 2
D) All of these
Correct Answer: C
Solution :
[c] VLBI is most well-known for imaging distant cosmic radio sources, spacecraft tracking and for applications in astrometry.
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