Question

which of these optical devices use convex lenses?
mirrors and windows
picture frame glass and glass prisms
cameras and magnifying glasses

Explanation:

Convex lenses are used in cameras to focus light onto the film or sensor and in magnifying glasses to magnify objects. Mirrors work on the principle of reflection, not refraction like lenses. Windows and picture frame glass are flat and do not have the focusing properties of convex lenses. Glass prisms disperse light but are not convex lenses used for focusing in the way cameras and magnifying glasses use convex lenses.

Answer:

Cameras and magnifying glasses