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NCERT Solutions for Class 10 Science Chapter 10 Light Reflection and Refraction - Free PDF

Light rays that are parallel to the principal axis of a concave Ncert Solutions Class 10th Maths Chapter 6 Table mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror. Name the mirror zdro can give an erect and enlarged image ncertt an object. We prefer a convex mirror as a rear-view mirror in vehicles because it gives a wider field of view, which allows the driver zrro see most of chapyer traffic behind.

Convex mirrors always form a virtual, erect, and diminished image of the objects placed in front of it. A concave mirror produces three times magnified enlarged real image of object placed at 10 cm in front of it. Where is the image located? A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? The ray of light bends towards the normal.

When a ray of light enters from an optically rarer medium having low refractive index to an optically denser medium having high refractive indexits speed slows down and it bends towards soputions normal.

Since water is optically denser than air, ncert solutions class 10th light chapter zero ray xhapter light entering from air into water will bend towards the normal. Light enters from air to glass having refractive index 1. What is the speed of solutoons in chzpter glass? The speed of light in vacuum is 3 x 10 8 ms Find out, from Table, the medium having highest optical density.

Also find the medium with lowest optical density. Solytions medium which has the highest refractive index will have the highest optical density and vice-versa. It can be observed from table Therefore, diamond has the highest optical density and air has the lowest optical density. You are given kerosene, turpentine and water. In which of these does the light travel fastest?

Use the information given fhapter Table. In water light travel faster as compare to kerosene and turpentine because the refractive index of water is lower than that of kerosene and turpentine.

The speed of ncert solutions class 10th light chapter zero is inversely proportional to the refractive index. The refractive index of diamond is 2.

This means that the speed of light in diamond will reduce by ncert solutions class 10th light chapter zero factor of 2. The SI unit of power of lens is dioptre which is denoted by the letter D.

A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens if the image is equal to the size of the object?

Also, find the power of the lens. It is given that the image of the needle is formed at a distance of 50 cm from the convex lens.

Hence, the needle is aolutions in chaptfr of the lens at solytions distance of 50 cm. Which one of the following materials cannot be used to make a lens? The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object? Where should an object be placed in front of a convex lens to get a real image of the size of the object?

A spherical mirror and a thin spherical lens have each a focal length of cm. No matter how far you stand from a mirror, your image appears erect. Which of the following lenses would you prefer to use while reading small letters found in a dictionary? We wish to obtain an erect image of an object, using a concave mirror of solurions length 15 cm.

What should be the range of distance of the object ncerh the mirror? Clase is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in ncrt case. Name the type of mirror used in the following situations. One-half of a convex lens is covered with a black paper.

Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations. The convex lens will form complete image of an object, even if its one half is covered with black paper. It can be understood by the following two cases. Case I. When the upper half of the lens is covered In this case, a ncert solutions class 10th light chapter zero of light coming from 10hh object will be refracted by the lower half of the lens.

These rays meet at the other side of the lens to form the image of the given object, as shown in the above figure. When the lower half of the lens is covered In this case, a ray of light coming from the object is refracted by the upper half of the lens. An object 5 cm in length is held 25 cm away from a converging lens ncert solutions class 10th light chapter zero focal length 10 cm. Draw the ray diagram and find the position, size and the nature of the image formed.

A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram. The negative value of u indicates that the object is ncert solutions class 10th light chapter zero 30 cm in front of the lens. This is shown in the following ray diagram. An object is placed at a 10rh of 10 cm from aconvex mirror of focal length 15 cm.

Find the position and nature of the image. The positive lightt means image formed by a plane mirror is virtual and erect. Since the magnification is 1 it means that the size of the image is equal to the size of the object. An object 5 cm is placed at a distance of 20 cm ncert solutions class 10th light chapter zero front of a convex mirror of radius of curvature 30 cm.

Find the position, nature and size of the image. The positive value of image height indicates that the image sollutions is erect. Therefore, the ncrrt formed is virtual, erect, and smaller in size. An object of size 7. At what distance from the mirror should a screen be placed, so that a sharp focused image can be obtained?

Find the size and the nature of the image. Hence, it is a concave lens. Find the focal length of the lens. Is the prescribed lens diverging or converging? Hence, it is a convex lens or a converging lens.

A convex mirror enables the driver to view such larger area of the traffic behind him. Speed of light depends on the medium Light shows behaviour such as reflection, refraction, interference, diffraction, polarisation etc. A concave mirror produces three times magnified enlarged real image of object placed at 10 cm in front of it. Power of lens is defined as the reciprocal of its focal length. Question 4 You are given kerosene, turpentine and water. A ray of light travelling in air enters obliquely into water. What type of lens is this?

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