Light usually refers to visible light, which is electromagnetic radiation that is visible to the human eye and is responsible for the sense of sight.Read para and answer
(i)A concave mirror produces 3 times magnified real image of an object at 10 cm in front of it.Where is image located
(ii)If a concave mirror has a focal length of 10 cm find the 2 positions where an object can be placed to give image twice height of object.
(iii)An object is placed at a distance of 12 cm from a cancave mirror The image formed is real and 4 times lapger than the object.Caliculate distance of image from the mirror.
please answer all questions with detailed explanations

1
there are 3 formulas - 1/v+1/u=1/f. R=2f. m=-v/u. please apply them.
you are asking questions of the same type - they are easy. try them.
ok sir but i am not sure of answers
please reply

Answers

The Brainliest Answer!
2014-12-19T17:13:11+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
1.  m = -3 = -v/u  =>  v = 3 u  = -30 cm    as u = - 10cm 

2. f = -10cm     
     v = 2u  =>  1/2u+ 1/u = -1/10    =>  u = - 15 cm    v= - 30 cm
     v = -2 u  =>  -1/2u +1/u = -1/10  =>  u = -5 cm

3.
       u = -12cm      m = -4 = - v/u      v = 4u = -48 cm
          -1/48 -1/12 = 1/f  =>  f = - 48/5 cm
          
3 5 3
ftre is coming sir so i have to solve these can you please help me ou
please reply quickly
sir are you there rigth now
sir please reply
i would be thankful to you