Question

1.What makes things visible ?
2.What are the properties of the image ?
3.What would the images be when the reflecting
surfaces are curved ?
4.How are the rays parallel to the principle axis ,
reflected by a convex mirror ?
5.Is there a relationship between the radius of
curvature 'R', and focal length 'f', of a spherical
mirror ?​

Answer 1

Ans 1 : Two things make an object visible. The main one is contrast. An object must react differently to visible light than it's surroundings. If an object doesn't react to visible light, and it's surroundings does something other, the object will be visible.

Ans 2 : Properties of an image formed by plane mirror :

(I) The image obtained is virtual.

(ii) The image is laterally inverted.

(iii) The image is erect.

(iv) The size of the image is same as the size of the object.

(v) The distance between the image obtained is same as the distance between the object from the mirror.

Ans 3 : The mirror with reflecting surface curved outward is called the convex mirror. In these mirrors, the bulging portion is the reflecting surface. Convex mirrors from virtual, diminished, erect images