Understanding
Light
With Mrs. Jones or Mrs. J
Agenda
Names….Help
me!
Please me a name tent
to help me learn your
names faster
Who are you??
• Time to be silly!
• Without saying a
word…act out something
that tells me who you
are or about something
you like.
• Ex: If you like dancing
What do you know
about light?
• Share your thoughts with
the person next to you,
give them at least 3
things you know about
light.
• Be ready to share with the
What is light??
Properties of
Light
• Light – a form of energy that
travels in waves and allows us to
see
• Reflection –the bouncing back of
light when it hits a surface
• Refraction – the bending of light
as it passes from one material to
another
• Absorption – when light is taken
How light
travels
• Light travels in
straight lines
• It can travel
through a vacuum
Reflection
• Definition: Light bouncing off
surfaces
• What happens to light when it
hits a mirror?
Refraction
• Definition: Light
bending when it enters
a different medium
• Why does a straw
look bent in water?
Refraction vs Reflection
Summary
• Light travels in
straight lines, can
reflect and refract,
and is part of the
electromagnetic
spectrum
• How does
understanding light
help us in our daily
lives?
Pinhole
Camera
• We are going to
create a simple
camera using a light
– tight box
• Follow the
instructions so we
can build the Pin
hole camera
Pinhole Camera
• 1.制作外盒：剪出一张长方形的黑色卡片纸，尺寸约为 20 厘米 x
10 厘米。将这张纸折叠成 4 部分，形成一个两端开放的盒子。
确保所有边缘都用胶带或胶水牢固地粘住，以防止任何光线进入。
2.制作内盒：再剪一张黑色卡片，比第一个盒子略小，大约 19
厘米 x 9 厘米。这件作品将紧贴在外盒内，起到不透光内腔的作
用。
3.制作针孔：在外盒的一侧，用尖锐的工具在外面的黑纸上粘上，
打一个直径约 0.2-3 毫米的小孔。这将用作光圈。
4.安装探测器：在小盒子的一端创建一个边界（见下图）。然后
将一张半透明的纸固定在边界上（见图）。这张纸将充当检测器，
捕获通过针孔进入的光线可见的图像。
Light Reading Answers
Vocabulary Matching Answer Key
1.Light - B. A form of energy that allows us to see.
2.Reflection - D. The process of light bouncing off a
surface.
3.Refraction - C. The bending of light as it passes
through a medium.
4.Lens - A. A curved piece of glass that bends light.
5.Luminous - G. Objects that produce their own light.
6.Non-luminous - H. Objects that do not produce their own
light but reflect light.
7.Prism - J. A transparent object that can change light
direction.
8.Color Spectrum - E. The range of colors produced when
light is split.
1. What is the difference between luminous and non-luminous objects?
•发光物体产生自身的光（例如，太阳、星星、灯泡），而非发光物体本身不
产生光；它们反射来自发光源的光（例如，月亮、行星、书本）。
2. Describe how a prism can create a color spectrum.
•当白光通过棱镜时，它会弯曲并分裂成一个颜色光谱，包括红色、橙色、黄
色、绿色、蓝色、靛蓝和紫色（ROYGBIV）。
3. How does the position of the light source affect the size of a
shadow?
•影子的大小会根据光源的距离和角度而变化；靠近的光源会产生更大的影子
，而远处的光源会产生更小的影子。
4. Why is light important for plants?
•光对光合作用至关重要，光合作用是植物将光能转化为化学能的过程，使
它们能够生长并产生氧气。
5. Explain the process of reflection using a mirror as an example.
•反射发生在光线碰到光滑表面时，例如镜子，并反弹回我们的眼睛，使我
们能够看到自己的倒影。
6. How does light transfer energy in our environment?
•光通过植物中的光合作用和阳光的辐射加热地球来转移能量，这影响天气
模式和气候条件。