A beautiful girl with two normal eye wants to see full width of her face by a plane mirror. The eye to eye and ear to ear distances of her face are 4 inch and 6 inch respectively. Find the minimum width of the required mirror.

A beautiful person with two normal eyes wants to see full width of her face by a plane mirror. The eye and ear to ear distances of her face are 10 cm and 14 cm respectively. The minimum width of required mirror is :

A man is standing at distance x from a plane mirror in front of him. He wants to see the entire wall in mirror which is at distance. y behind the man. Find the minimum size of the mirror required.

Consider the situation in figure. The bottom of the pot is reflecting plane mirror , S is small fish is a human eye . Refractive index of water is mu . Fish can see two images of human eye , first due to refractive only and other due to refraction and than reflection . Distance of these images from fish are S_(1) "and" S_(2) respectively . Human eye can also see the two images of fish, first due to refraction only and other due to reflection and then refraction . Distance of these images from human eye are S_(3) "and" S_(4) respectively . Match the quantities of column-I (with their value in column-(II) {:("Column I","Column II"),((A) S_(1),(p)H[1 + (1)/(2mu)]),((B)S_(2),(q) H[mu + (1)/(2)]),((C)S_(3) , (r) H[1 + (3)/(2mu)]) , ((D) S_(4) , (s) H[mu + (3)/(2)]):}

Two plane mirrors, a source S of light, emitting wavelengths of lambda_(1) = 4000overset(@)A" and" lambda_(2) = 5600overset(@)A and a screen are arranged as shown in figure. The angle theta shown is 0.05 radian and distance a and b are 1 cm and 38 cm respectively. (a) Find the fringe width of interference pattern formed on screen by the blue light. (b) Calculate the distance of first black line from central bright fringe. (c) Find the distance between two black lines which are nearest to the central bright fringe.

A student of height 1.9 m can see his full image in a plane mirror fixed on a wall. His eyes are 1.85 m from the floor level. What is the minimum length of the plane mirror required to get the full image of the student ?