Question

A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. the image will form at                                                                                          

Solution

Correct option is

15 cm behind the mirror

 

u = –30 cm  

                       f = +30 cm 

                      v = ?   

   

                      v = 15 cm

SIMILAR QUESTIONS

Q1

Two plane mirrors are placed parallel to each other. A point object is placed between them. The distance of image formed in one of the mirror is in

                                                                                                 

Q2

 

Two plane mirrors are parallel to each other and spaced 20 cm apart. A luminous point object is placed between them and 5 cm from one mirror. What are the distances from each mirror of the three nearest images in each?    

 
Q3

If two adjacent walls and the ceiling of a rectangular room are mirror surfaced, then how many images of himself, a man can see?

 

Q4

 

Two bodies A and B are moving towards a plane with speeds VA and VB respectively as shown in figure. The speed of image of A with respect to the body B is

                                                                                                  

Q5

A beam of convergent light converges to a point 0.5 in front of the mirror after reflection at a convex mirror but in the absence of the mirror the beam converges to a point 0.2 behind the mirror. The radius of curvature of the mirrors is

                                                                              

Q6

A particle executes SHM in front of a concave mirror of radius 1 m, about the centre of curvature, with very small amplitude a. The amplitude of oscillation of the image is

Q7

A particle moves towards a concave mirror of focal length 30 cm along its axis and with a constant speed of 4 cm/ sec. What is the speed of its image when the particle is at 90 cm from the mirror?

Q8

A thin flat glass plate is placed in front of a convex mirror. At what distance b from the plate should a point source of light S be placed so that its image produced by the rays reflected from the front surface of the plate coincides with the image formed by the rays reflected from the mirror? The focal length of the mirror is f = 20 cm and the distance from the plate to the mirror a = 5 cm. How can the coincidence of the images be established by direct observation

                                                                                                                                     

Q9

 

A screen S is placed a distance b = 5 cm from a circular convex mirror as shown in figure. An object RP of height h = 3 cm is arranged a distance a = 5 cm from the screen. Where must an observer position himself to see the image of the entire object? What are the maximum dimensions of the object (with the given arrangement of the object, the mirror and the screen) for the mirror to reproduce and image of the entire object? The diameter of the mirror is d = 10cm.

                                                                            

 

                                                                     

Q10

Figure shows two rays A and B being reflected by a mirror and going as A` and B`. The mirror