Rotating Head Periscope - Student Note
This is resource material to support parts of STAO’s ScienceWorks Grade 10 Optics
The following are excerpts from
L4 The Laws of Reflection and
L5 Putting Things Together
for use with Rotating Head Periscope Power Point
In the following diagrams arrows are used for the images in order to ease drawing.
Why U-boat Captains Have To Spin In Circles
1. Use the laws of Reflection to
show how the Eye/Brain sees the
top and bottom of a candle in a
periscope?
2. Use the laws of reflection to show
how the Eye/Brain sees the top and
bottom of a candle if the top mirror is
rotated to face backwards?
3. Use the laws of reflection to show
how the Eye/Brain sees the top and
bottom of a candle if the top mirror is
rotated to face sideways?
L5 Putting Things Together - Student Note
In the following diagrams use arrows for the images in order to ease drawing.
1. Where exactly are the Images in a periscope AND how do light rays reach the
Eye/Brain from the Object?
2. Your Turn! Where exactly are the Images in a reversed periscope AND how do
light rays reach the Eye/Brain?