Ray Optics
Optics is the study of light in the field of physics. It refers to the study and properties of light. Optical phenomena can be classified into three categories: ray optics, wave optics, and quantum optics. Geometrical optics, also known as ray optics, is an optics model that explains light propagation using rays. In an optical device, a ray is a direction along which light energy is transmitted from one point to another. Geometric optics assumes that waves (rays) move in straight lines before they reach a surface. When a ray collides with a surface, it can bounce back (reflect) or bend (refract), but it continues in a straight line. The laws of reflection and refraction are the fundamental laws of geometrical optics. Light is an electromagnetic wave with a wavelength that falls within the visible spectrum.
Converging Lens
Converging lens, also known as a convex lens, is thinner at the upper and lower edges and thicker at the center. The edges are curved outwards. This lens can converge a beam of parallel rays of light that is coming from outside and focus it on a point on the other side of the lens.
Plano-Convex Lens
To understand the topic well we will first break down the name of the topic, ‘Plano Convex lens’ into three separate words and look at them individually.
Lateral Magnification
In very simple terms, the same object can be viewed in enlarged versions of itself, which we call magnification. To rephrase, magnification is the ability to enlarge the image of an object without physically altering its dimensions and structure. This process is mainly done to get an even more detailed view of the object by scaling up the image. A lot of daily life examples for this can be the use of magnifying glasses, projectors, and microscopes in laboratories. This plays a vital role in the fields of research and development and to some extent even our daily lives; our daily activity of magnifying images and texts on our mobile screen for a better look is nothing other than magnification.
![C₁
QUESTIONS
A ray of light travelling in air enters obliquely into water. Does the light
ray bend towards the normal or away from the normal? Why?
1.
Light enters from air to glass having refractive index 1.50. What is the
speed of light in the glass? The speed of light in vacuum is 3 x 10³ m s-¹.
2.
Find out, from Table 10.3, the medium having highest optical density.
Also find the medium with lowest optical density.
3.
4.
You are given kerosene, turpentine and water. In which of these does
the light travel fastest? Use the information given in Table 10.3.
5.
The refractive index of diamond is 2.42. What is the meaning of this
statement?
10.3.3 Refraction by Spherical Lenses
You might have seen watchmakers using a small magnifying glass
see tiny parts. Have you ever touched the surface of a magnifying g
with your hand? Is it plane surface or curved? Is it thicker in the middle
or at the edges? The glasses used in spectacles and that by a watchmak
are examples of lenses. What is a lens? How does it bend light rays?
shall discuss these in this section.
M
A transparent material bound by two surfaces, of which one or bod
surfaces are spherical, forms a lens. This means
that a lens is bound by at least one spheric
surface. In such lenses the other surface woul
0
usually re
centre of
diameter
We shall c
aperture i
curvature
called thir
of light are
Activ
CAU
doing
do sc
Hold
Focu
brigh
- Hold
obser
in Ac
The pa
after a whi
parallel ray
bright spot
paper is a r
No
point gener](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcd52f2fe-1d04-4f08-9e13-213b0c736730%2Ffd7b49e3-0f47-4097-bed2-f51a0f925294%2Fdejn80s_processed.jpeg&w=3840&q=75)
![(b)
At
(c) At infinity
(d) Between the optical centre of the lens and its principal focus.
A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The
mirror and the lens are likely to be
(a) both concave.
(b) both convex.
Reflection and Reaction
1](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcd52f2fe-1d04-4f08-9e13-213b0c736730%2Ffd7b49e3-0f47-4097-bed2-f51a0f925294%2F17alk06_processed.jpeg&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 2 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![College Physics](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![University Physics (14th Edition)](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Introduction To Quantum Mechanics](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![College Physics](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![University Physics (14th Edition)](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Introduction To Quantum Mechanics](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![Physics for Scientists and Engineers](https://www.bartleby.com/isbn_cover_images/9781337553278/9781337553278_smallCoverImage.gif)
![Lecture- Tutorials for Introductory Astronomy](https://www.bartleby.com/isbn_cover_images/9780321820464/9780321820464_smallCoverImage.gif)
![College Physics: A Strategic Approach (4th Editio…](https://www.bartleby.com/isbn_cover_images/9780134609034/9780134609034_smallCoverImage.gif)