A combination of two thin convex lenses of equal focal lengths, is kept separated along the optical axis by a distance of 20 cm between them. The combination behaves as a lens A combination of two thin convex lenses of equal focal lengths is kept separated along the optical axis by a distance of 20 cm between them. The combination behaves as a lens October 9, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related