Geometric Optics_21

What are hyperopia & myopia – symptoms, reasons, and fixes

Two of the most common vision problems are myopia and hyperopia where images of objects are not properly focused on the retina of the human eyes. To understand these let’s briefly discuss how human eyes act as compounded lenses. If we understand this first, it will be better for us to understand the symptoms & […]

[pdf] Geometrical Optics Grade 10 & grade 11 Notes download (10th & 11th Grade physics) | class 10 & class 12 physics notes on light & Geometrical Optics

This Geometrical Optics Notes [PDF download] is primarily for the grade 10 and grade 11 syllabus of different international boards. This also covers the physics syllabus for class 9 to class 12 on Light or Optics for boards like ICSE, CBSE, etc. This physics class note covers the theoretical as well as the numerical part […]

How to deviate light rays by 180 degrees with a prism?

Let’s see how a light ray can be deviated by 180 degrees with the help of a prism. A total reflecting prism is used here to get a 180-degree deviation of a light ray. Conditions to get a 180-degree deviation of a light ray with a prism Conditions are as follows to get a deviation […]

What is a total reflecting prism and when to use it?

What is a total reflecting prism? A right-angled isosceles prism that has a 90-degree angle and two 45-degree angles is known as a total reflecting prism. A total reflecting prism is named so because light ray incident normally on any of its faces suffers total internal reflection inside the prism. When to use a total […]

How does a mirage form?

One of the most interesting effects of atmospheric refraction occurs in the mirage, which is usually associated with hot deserts. Mirage is the result of atmospheric refraction and total internal reflection. The air in the desert is hot near the ground and cools rapidly with height. The hotter air is optically less dense. So as […]

How Total Internal Reflection happens in Optical fibres?

Optical fibres are used in medical endoscopes to see inside the body, and in communications to carry light signals. These fibres take the help of Total Internal Reflection of light to operate. Now, let’s see how Total Internal Reflection happens in Optical fibres. How Total Internal Reflection happens in Optical fibres The light ray is […]

Why do diamonds sparkle when white light is directed at them?

Diamonds sparkle when white light is directed at them – the optical phenomenon behind this is Total internal reflection of light rays. Let’s discuss this in details. Diamonds sparkle when white light is directed at them – why and how? When white light enters a diamond, it is split into the colours of the spectrum. […]

Dispersion of Light through a Prism – the reason you must know

Why white light splits into seven colors when passing through a prism? Why the dispersion of light through prism happens? If these queries are interesting to you then this post will certainly help you to know the reason behind this optical phenomenon. So let’s begin. What is the dispersion of light? Isaac Newton found that […]

Difference between Reflection and Total Internal Reflection of light

Total Internal Reflection and Reflection are two different phenomena related to Light. Here we will talk about the difference between Reflection and Total Internal Reflection of light. Difference between Reflection and Total Internal Reflection of light 1] For Total Internal Reflection to happen the light ray has to pass from an optically denser medium to […]

What is the Critical Angle for the diamond-air interface?

What is the Critical Angle for the diamond-air interface? The Critical Angle for the diamond-air interface is 24 degrees. This means if the ray of light in the diamond medium strikes the separating surface between the diamond and air making an angle more than 24 degrees with the normal to the point of incidence then […]

What is the Critical Angle for the glass-air interface?

The Critical Angle for the glass-air interface is 42 degree. This means if the ray of light in the glass medium strikes the separating surface between glass and air making an angle more than 42 degree with the normal to the point of incidence then that ray of light will undergo a total internal reflection […]

Glass Prism as a refracting medium | angle of prism

In this post, we will just talk about some special features of prism that make it a suitable medium to test the refraction of light. Subtopics discussed: Glass Prism as a refracting medium – features, and angle of prism Glass Prism – features of prism that contribute refraction through it To discuss the features we […]

What are the total internal reflection and critical angle?

This post is on the total internal reflection and critical angle. Let’s begin. What are the total internal reflection and critical angle? When a ray of light passes from denser to rarer medium, the refracted ray bends away from the normal. Hence, the angle of refraction is greater than the angle of incidence. Gradually if […]

Refractive Index Numericals class 10 & practice problems

In this post, we will solve a bunch of Numerical problems on the refractive index of light (class 10 Light chapter in Physics). The refractive index is written as RI as well. Students may try and solve these refractive index practice problems, to understand the inherent concepts of RI. The formulas used to solve the […]

Refraction of light – definition and important facts

Although light travels in straight lines in a transparent material, such as air, if it passes into a different material, such as water, it changes direction at the boundary between the two, i.e. it is bent. The bending of light when it passes from one material (called a medium) to another is called the refraction […]

Characteristics of an image formed by a plane mirror

Here is the list of characteristics of an image formed by a plane mirror.(i) The size of the image is the same as the size of the object. (ii) The distance of the object in front of the mirror is equal to the distance of the image behind the mirror. (iii) A virtual and erect […]

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