Light - Reflection & Refraction FULL CHAPTER in Animation | NCERT Science | CBSE Class 10 Chapter 1 · Grade booster
本视频通过动画形式讲解光的反射与折射，涵盖平面镜、曲面镜及透镜的原理，适合练习物理基础概念和图像理解。
Light, Reflection and Refraction.
光、反射与折射。
We all know that light is a form of energy, it travels in a straight line.
我们都知道，光是一种能量，它以直线形式传播。
In this chapter, we are going to study the Reflection and Refraction of Light.
在本章中，我们将研究光的反射与折射现象。
What is Reflection of Light?
什么是光的反射？
When a light strikes a smooth polished surface like mirror, it bounces back.
当光线照射到像镜子这样光滑、抛光的表面时，它会反射回来。
It is called as Reflection of Light.
这种现象被称为“光的反射”。
We can study the Reflection of Light with the help of mirrors.
我们可以借助镜子来研究光的反射现象。
Mirror is an opaque object with shiny reflective surface.
镜子是一种不透明的物体，其表面具有光滑的反射特性（即能够反射光线）。
It is because of the Reflection of Light, we will be able to see our images in mirrors.
正是因为光线的反射，我们才能在镜子中看到自己的影像。
What is Refraction of Light?
什么是光的折射？
When a light ray passes from one medium to another medium, its traveling speed changes and results in change of its direction.
当一束光线从一种介质传播到另一种介质时，它的传播速度会发生变化，从而导致光线的传播方向也发生改变。
This phenomenon is called Refraction of Light.
这种现象被称为“光的折射”。
A straw in a glass appears to be bent, this is due to Refraction of Light.
玻璃杯中的吸管看起来是弯曲的，这是因为光的折射作用。
We can study the Refraction of Light with the help of Lens.
我们可以借助透镜来研究光的折射现象。
Lens is a transparent object usually made of glass.
镜头是一种透明的物体，通常由玻璃制成。
High glasses are the examples of lenses which use in our day -to -day life.
高脚杯就是日常生活中所使用的透镜的例子。
First, let us study the Reflection of Light with the help of mirrors.
首先，让我们借助镜子来研究光的反射现象。
This is a plane mirror.
这是一面平面镜。
When a light ray strikes a plane mirror, it gets reflected back.
当一束光线照射到平面镜上时，它会被反射回来。
According to the loss of Reflection, the angle of Reflection is equal to the angle of Incidents.
根据“Reflection”（反射）功能的失效情况，可以推断出：反射角等于入射角。
Image formation.
图像的形成。
Plane mirrors create virtual images that appear to be located behind the mirror at the same distance as the object in front of the mirror.
平面镜会形成虚像，这些虚像看起来位于镜子的后面，并且与镜子前的物体之间的距离相同。
These virtual images are not real, that means they cannot be projected onto a screen.
这些虚拟图像并不是真实的，因此它们无法被投影到屏幕上。
They are formed by the apparent intersection of reflected light rays when extended backward.
这些现象是由于反射光线在向后延伸时看似相互交汇而形成的。
Size and magnification.
尺寸与放大倍数。
The size of the image in a plane mirror is the same as the size of the object.
平面镜中反射出的图像大小与物体本身的大小是相同的。
There is no magnification, means that objects in a plane mirror appears to be the same size as they are in reality,
平面镜没有放大作用，这意味着平面镜中的物体看起来与它们在现实中的大小完全相同。
laterally reversed.
横向翻转（即物体在水平方向上发生180度的旋转）。
The image is formed by plane mirrors or laterally reversed.
该图像是通过平面镜形成的；或者，也可以通过将图像在横向方向上进行反转来生成。
Also known as left -right reversed.
也被称为“左右顺序颠倒”的情况。
This means that if you raise your right hand in front of a plane mirror,
这意味着：如果你在平面镜前举起你的右手，
your image will appear to raise its left hand.
你的形象看起来会举起它的左手。
Now, let us understand the Reflection of Light by spherical mirrors.
现在，让我们来了解一下光线在球面镜上的反射现象。
A spherical mirror is a curved mirror and it forms the part of a sphere.
球面镜是一种曲面镜，其形状与球体的一部分完全吻合。
Spherical mirrors are of two types.
球面镜有两种类型。
One, convex mirrors and two, concave mirrors.
一共有三面镜子：一面是凸面镜，另外两面是凹面镜。
A convex mirror is a type of a spherical mirror that has an outward curved reflective surface.
凸面镜是一种球面镜，其反射表面呈向外凸出的弧形。
A concave mirror is a type of a spherical mirror that has an inward curved reflective surface.
凹面镜是一种球面镜，其反射表面向内凹陷（即呈凹形）。
To understand, reflection by a spherical mirror, we need to know certain terms.
为了理解球面镜的反射现象，我们需要掌握一些相关的术语。
Pole.
波兰（Pole）。