View All num of num See all Photos L-3 Communications This employer has taken extra steps to respond to reviews and provide job seekers with accurate company information, photos, and reviews. Interested for your company?Learn More. www.l-3com.com Employer Engaged Overview Reviews Salaries Interviews Jobs Photos Benefits 766 Reviews 943 Salaries 174 Interviews Follow Add Review or Salary Follow Add Review or Salary Interview Question Research Engineer Interview Wilmington, MA L-3 Communications "Oh, you've learned about GRIN lenses in your class? Tell bout how they work." Tags: See more , See less 8 Answer Add Tags Answer Interview Answer 1 Answer ▲ 0 ▼ I was fairly uncertain, as I was know only about their manufacture and not much on the principal of operation. I mentioned this, and told him outright that I hadn't learned that. Interview Candidate on Apr 24, 2012 Add Answers or Comments To comment on this, Sign In or Sign Up.