A concave mirror has a focal length of 20 cm. (a) What is its radius of curvature?
(b) At what distance from the mirror must an object and an image be so that the magnification 1S
(c) Where is the image for an object distance of 15 cm? What kind of image is it?
(d) For what range of object distances is the image larger than the object? For what part of this range is the image real and for what part is it virtual?

Explanation:

a )

focal length of mirror = 20 cm

a ) radius of curvature = 2 x focal length = 2 x 20 = 40 cm

b )

c ) object distance u = 15 cm

image distance v = ?

focal length f = 20 cm from the formula

v = + 60 cm

So image is magnified . It will be formed on the other side of the mirror .It will be virtual .

d )

The image is magnified when object is placed between 2 f and f or between centre of curvature and focal length . In this case image is real and magnified . The image is magnified when object is placed between focal length and the pole . In this case image is virtual .

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.

there are no correct statementd on the list of choices you provided.