Suppose the angular magnification of a compound microscope in normal use is 30.What is the correct explanation of the statement.
In normal use the final image by a compound microscope at D(=25 cm).Angular magnification M=30 means the ratio of visual angle sub tended by the final image of an object at the eye to the visual angle subtended by the same object at the eye(when object is placed at D) is 30.
The formula for compound microscope when in normal usage is $M=(-v_0/u_0)*(1+D/f_e)$ ,So is my approach correct or wrong.
$D$ refers to the distance of least vision.
$u_0$ refers to the distance between the object and the objective lens.
$v_0$ refers to the distance between the image and objective lens.
$f_e$ refers to the focal length of the eyepiece lens.