The image would appear too dim c. The resolution is reduced d. The section image will be blurred e. There will be colour fringes (chromatic aberration) 2) Why should immersion oil have the same refractive index as glass? a. Provides a flat (plan) field of view, suitable for photography b. Reduces light loss due to reflection and refraction c. Reduces scratching when using the oil immersion lens d. To prevent chromatic aberration e. To prevent spherical aberration 3) A scientist notices that the eyepiece has a x10 magnification, and wants to remove it and use it as a x10 magnifying g
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.
1) What is the most important problem with an out-of-focus condenser when using a x40 objective?
a. The eyepiece graticule will not be in the same focal plane
b. The image would appear too dim
c. The resolution is reduced
d. The section image will be blurred
e. There will be colour fringes (chromatic aberration)
2) Why should immersion oil have the same refractive index as glass?
a. Provides a flat (plan) field of view, suitable for photography
b. Reduces light loss due to reflection and refraction
c. Reduces scratching when using the oil immersion lens
d. To prevent chromatic aberration
e. To prevent spherical aberration
3) A scientist notices that the eyepiece has a x10 magnification, and wants to remove it and use it as a x10 magnifying glass.
How should the eyepiece be used to work as a magnifying glass?
a. The object must be between 1 and 2 focal lengths from the lens
b. The object must be closer than 1 focal length from the lens
c. The object must form a real image on the opposite side of the lens to itself
d. The object must form a real image on the same side of the lens as itself
e. The object must form a virtual image on the opposite side of the lens to itself
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