REFLECTION OF LIGHT AT CURVED SURFACES

What is the relation between radius of curvature R and focal length f of a mirror ?

• R = 2f

• R=2/f

• R=1/2f

• f=2R

What is the mirror formula ?

• 1/f = 1/v + 1/u

• 1/f = 1/u -1/v

• 1/u = 1/f + 1/v

• 1/f = u + v

A ray of light is seen to be reflected from a plane mirror at an angle of  $30\degree$  with the mirror.The angle of incidence must be

•  $30\degree$  

•  $120\degree$  

•  $90\degree$  

•  $60\degree$  

An object is placed at the centre of curvature of a concave mirror.The distance between the object and its image is

• Equal to f

• Equal to 2f

• Zero

• Equal to 4f

An object is placed at a distance of 10cm from a convex mirror of focal length 15cm.find the position and nature of the image

• v = -6cm, real & inverted

• v = -3cm , real & inverted

• v = +6cm , virtual & erect

• v = +15cm ,virtual & erect

An object 8cm in length is placed at a distance of 40cm in front of a concave mirror of radius of curvature 30cm.Find the position of the image and its size

• v = -24cm, h = -4.8cm

• v = 24cm , h = 4.8cm

• v = -32cm , h = -5.2cm

• v - 32cm , h = 5.2cm

An object is placed at a distance of 12cm in front of a concave mirror.It forms a real image four times larger than the object.calculate the distance of the image from the mirror ?

• v = -53cm

• v = -48cm

• v = 53cm

• v = 48cm