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focal length

A measure of how effectively a curved mirror or lens converges or diverges incident light. A shorter focal length for a mirror or lens indicates a greater optical power.

Science Learning Hub Survey 2014

Dear Hub visitor,

You're invited to participate in an online survey about the New Zealand Science Learning Hub. This survey was designed to help Hub staff enhance and develop further the site. This is different from our November 2013 survey, so even if you took part in that survey, we would appreciate you taking this survey as well.

Take the survey