Question

to determine the focal length of a concave lens by obtaining the image of distant object
1)name the surface that returns the light falling on it?
2)If the angle of incidence is 30° .How much is the angle between the incident ray and the reflected ray ?
3)when does a concave mirror from a virtual image ?
4(what is the nature of the image when the object is placed at the focus F of the mirror?​

Answer 1

Answer:

no never this much how can I answer ......sorry mate.......