# Show that a paraboloidal wave centered at the point P1 is converted by a lens of focal

Fantastic news! We've located the answer you've been seeking!

## Question:

Show that a paraboloidal wave centered at the point P1 is converted by a lens of focal length f into a paraboloidal wave centered about P2, where 1/z1+1/z2=1/f. [hint: using U1, U2 and t]

**Related Book For**