Question

send me answer for this questions ​

Answer 1

answer is option (iii) - , -

u know that all the distances measured on left side of lens in taken in negative hence object distance is negative and for R2(that is reflecting surface 2) it is also -ve since it will be also measured on left side

1st surface ->()<- 2nd surface

  R2(-ve)                   R1(+ve)

hope this helps

Answer 2

direction in which light goes is taken as +ve.

therefore, in this case u and R2 are both -ve ,i.e. option (c) is correct.