Two Lenses, the First with Focal Length −12

question 27

Multiple Choice

Two lenses, the first with focal length −12.5 cm and the second with focal length 20.0 cm, are separated by 15.0 cm. If an object is placed 50.0 cm in front of the first lens, where is the final image formed?

• A) 10.0 cm before the first lens
• B) 25.0 cm before the second lens
• C) 25.0 cm after the second lens
• D) 50.0 cm after the second lens
• E) 100 cm after the second lens

---

Definitions:

Implementation

A process involving the testing of assumptions of new ideas to continuously shape them into viable opportunities.

AEIOU Framework

Acronym for Activities, Environments, Interactions, Objects, and Users—a framework commonly used to categorize observations during fieldwork.

Laboratory-Based Research

A type of research conducted in controlled environments or dedicated facilities focusing on scientific experiments.

IDEO

An international design and consulting firm known for pioneering the concept of human-centered design and innovation.