Finding unknown when limit is given

Find the unknown length in the given figure.

A plano convex lens of unknown material and unknown focal length is given. With the help of a spherometer we can measure the

With the help of circuit diagram, explain how a meter bridge can be used to find unknown resistance of a given wire?

Find the value of the limit given below lim_(n to 1/2)(4n^(2)-1)/(2n-1)

Determine whether an unknown involved in a quadratic equation when its roots are given.kx^(2)+2x-3=0;x=2

In YDSE setup slits are illuminated by a light of wavelength 4000Å and a light of unknown wavelength. It is observed that fourth dark fringe of known wavelength coincide with second bright fringe of unknown wavelength. Find the unknown wavelength.

Determine the values of unknown involved in a given quadratic equation when nature of the roots are given