Which kinds of lenses are in a light microscope?

a concave objective lens and a convex eyepiece lens
a convex objective lens and a concave eyepiece lens
concave objective and eyepiece lenses
convex objective and eyepiece lenses

Explanation :

A microscope is used to see a large image of magnified objects. It can magnify up to an order of thousands. It works on the principle that when an object is placed beyond the focus of an objective lens, it forms a virtual, highly magnified image.

The image is formed at the least distance of distinct vision. It used two types of lenses i.e. an objective lens and an eyepiece.

So, the correct option is (D) " convex objective and eyepiece lenses ".

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me