Day 35: Field of View in a Flat Mirror

Wednesday, 1 October 2014

image

In the last part of their flat mirror lab, I ask kids to describe how their view changes as their distance to the mirror changes. Every year, they tell me they see more of themselves in a mirror the farther they hold the mirror from their face. In order to bust this misconception, I scaled things up a bit with the above setup.

image

imageThey’re also always shocked when I show them the view isn’t changing at all. I remain unconvinced however that I’m actually busting a misconception and imagine instead that I’m totally bumming out Derek Muller.

Also, on Monday, I said I’d try a new approach to teaching kids to sight a distant object using a ruler. The problem is that we need to trace light rays accurately in the Mirror Lab. Yesterday I had great success with the ideas my colleague and I brainstormed. I had them practice with the clock then with an image of a pushpin in a mirror.

This day last year: Robotics & Pneumatics Training

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s