Three mass points each of mass m are placed at the vertices of an equilateral triangle of side l. What is the gravitational field and potential at the centroid of the triangle due to the three masses?

Explanation

Here, `lambda 5500 dotA= 5500xx 10^(-10)m`
aperture of objective `a_(0) = 5.0m`
Aperture of eye, `a_(a)= 2.5mm = 2.5xx 10^(-3)m`
`triangle theta = 1.22(lambda)/(a)= 1.22((5500xx10^(-10)m)/(5m))= 1.34xx 10^(-7)rad`
Minimum magnification needed,
`M_(0)= ("aperature of the objective "(a_0))/("aperature of the eye "(a_a))= (0.5m)/(2.5xx 10^(-3)m)=2000`.