Two thin similar convex glass pieces are joined together front to front with its rear portion silvered such that a sharp image is formed 20 cm from the mirror when the air between the glass pieces is replaced by water ( refractive index 4 / 3 ) then the image formed from the mirror is at a distance of

Can you pls explain this again in words i didn't understood why we took v as 20/2 and why we multiplied 4 while finding focal length
  • 18
two thin similar convex glass pieces
  • 0
For air filled combination will work as concave mirror

  • 26
Initially concave mirror
  • -6

  • 7
Check out the attachment .....if u understood give a like

  • 6
Please find this answer

  • -4
Answer is 12cm

  • -1
What are you looking for?