What's going on: Light travels in straight lines

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What's going on: Light travels in straight lines

The important concept to understand the colored shadows is that light travels in straight lines.

I'm gonna show that using this ruler.

I'm gonna put the one end of the ruler at the center of the red bulb.

It shows the light traveling along one path to the screen.

Of course, light from the red bulb hits everywhere on the screen traveling in straight lines, however along this path, if I put the pencil there, the pencil blocks the light traveling in a straight line along the ruler, and makes a shadow on the wall.

However, light from the blue bulb also travels in straight lines, and its straight line misses the pencil, and fills in the shadow from the red light.

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What's going on: Light travels in straight lines발음듣기

다른 번역문 등록

The important concept to understand the colored shadows is that light travels in straight lines.발음듣기

다른 번역문 등록

I'm gonna show that using this ruler.발음듣기

다른 번역문 등록

I'm gonna put the one end of the ruler at the center of the red bulb.발음듣기

다른 번역문 등록

It shows the light traveling along one path to the screen.발음듣기

다른 번역문 등록

Of course, light from the red bulb hits everywhere on the screen traveling in straight lines, however along this path, if I put the pencil there, the pencil blocks the light traveling in a straight line along the ruler, and makes a shadow on the wall.발음듣기

다른 번역문 등록

However, light from the blue bulb also travels in straight lines, and its straight line misses the pencil, and fills in the shadow from the red light.발음듣기

다른 번역문 등록

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