. A student wants to project the image of a candle flame on the walls


A student wants to project the image of a candle flame on the walls. of school  laboratory by  using a lens

 

(a) Which type of lens should he use and why

 

(b) At what distance in terms of focal length 'F' of the lens should he place the candle flame so as to get 

 

(1) a magnified, and  (ii) a diminished image  respectively on the wall

 

(c) Draw ray diagram show the formation of  the  image in  each  case

 

A student wants to project the image of a candle flame on the walls

 

Best Answer

(a)  A convex  lens  should be used. This  is because  it can  produce a real  image of the candle flame on the wall as it is a converging lens where  refracted rays actually  meet (b) & (c)   (i) A real magnified image is formed  when  the candle  flame is placed between F and 2F from  the convex  lens on  the other  side  of the wall

 

(ii) A real diminished image  is formed when  the candle  flame  is placed  beyond  2F from  the convex  lens on the other side  of the wall

 

A student wants to project the image of a candle flame on the walls

 

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