Download all answers in PDF file format or download Offline apps to use all the contents offline without internet. So, ncert solutions class 10th light chapter list Science chapter 10 question answers are useful for UP Board students. Properties of images formed by a plane mirrors: i The image formed by a plane mirror is virtual and erect. Properties of the image formed by a convex mirror: i This image is always virtual and erect.
Soputions of refraction of light: The refraction of light obeys the following two laws: First law: The incident ray, the refracted ray and Ncert Solutions Class 10th Physics Chapter Light Kit normal to the surface of separation at the point of incidence, all lie in the same plane.
Second law: The ratio of the ncery of the angle of incidence and the sine of the angle of refraction is constant for a given pair of media. The ratio n2 is called refractive index of the second medium with respect to the first medium. Refraction of light: The phenomenon of bending of light from its straight line path ncert solutions class 10th light Ncert Solutions Of Chapter Light Class 10th chapter list it passes obliquely from one transparent medium to another is called refraction of light.
The path of the ray of light in the first medium is called incident ray. The path of the ray of light in the second medium is called refracted ray.
The angle between ncert solutions class 10th light chapter list incident ray and the normal at the surface of separation is called angle of incidence i.
The angle solutiond the refracted ray and the normal at the surface of separation is called angle of refraction r. Question 1: Give three points of difference between real and virtual images. Answer 1: Real Image: i Here the rays actually meet at the image point.
Question 2: Distinguish between a concave and convex lens. Answer 2: Convex lens a It is thicker at the centre than at the edges. Concave lens: a It is thinner at the centre than at the edges. Question 1: Define the principal focus of a concave mirror. Calculate the focal length of the mirror of radius of curvature of 20 cm. Answer 1: The principal focus of concave mirror is a point on its principal axis at which a beam of light parallel to the principal axis actually converges after reflection from the mirror.
Question 2: State the type of mirror preferred as i rear view mirror in vehicles, ii shaving mirror. Justify your answer giving two reason in each case. Answer 2: i A convex mirror is preferred as a rear-view mirror because a It always forms an erect, virtual and diminished image of an object placed anywhere in front of it.
This suggests that the speed of light in diamond will reduce by a factor 2. The S. It is denoted by D. Important questions and CBSE previous years board questions related to chapter 10 are given with answers. List four properties of the image formed by a plane mirror. List the four properties of the image formed by a convex mirror. State the laws of refraction of light.
What is meant by refraction of light? Important Questions on 10th Science Chapter 10 Define the principal focus of a concave mirror. Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror.
This lught is known as the principal focus of the concave mirror. The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Name the mirror that can give an erect and enlarged image of an object. When an object is placed between the pole and the principal focus of a concave mirror, the image formed is virtual, erect, and enlarged. Why do we prefer a convex mirror as a rear-view mirror in vehicles? Convex mirrors give a virtual, erect, and diminished image of the objects placed in front of.
They are preferred as a rear-view mirror in vehicles because they give a wider field of view, which allows the driver to see most of the traffic behind ncert solutions class 10th light chapter list. A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or ncert solutions class 10th light chapter list from the normal? The light ray bends towards the normal. When a ray of light travels from an optically rarer medium to an optically denser medium, it gets chapterr towards the normal.
Since lish is optically denser than air, a ray of light travelling from air into the water will bend towards the normal. The refractive index of diamond is 2. What is the meaning of this statement? Bcert 1 dioptre of power of a lens.
Power of lens is defined as liight reciprocal of its focal length. Chapter Human Eye and Colourful World �.
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Then you will be able to download all the study materials of your preference in a click. You can also download the Class 10 Science Light Reflection and Refraction solution Hindi medium from Vedantu app as well by following the similar procedures, but you have to download the app from Google play store before doing that.
The best feature of these solutions is a free download option. Q5 :No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be a plane b concave c convex d either plane or convex Answer : d A convex mirror always gives a virtual and erect image of smaller size of the object placed in front of it.
Similarly, a plane mirror will always give a virtual and erect image of same size as that of the object placed in front of it. Therefore, the given mirror could be either plane or convex. Q6 :Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
Also, magnification is more for convex lenses having shorter focal length. Therefore, for reading small letters, a convex lens of focal length 5 cm should be used. Q7 :We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What 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 this case. Hence, to obtain an erect image of an object from a concave mirror of focal length 15 cm, the object must be placed anywhere between the pole and the focus. The image formed will be virtual, erect, and magnified in nature, as shown in the given figure. Q8 :Name the type of mirror used in the following situations.
Answer : a Concave b Convex c Concave Explanation a Concave mirror is used in the headlights of a car. This is because concave mirrors can produce powerful parallel beam of light when the light source is placed at Ncert Solutions Class 10th Physics Chapter Light Mp3 their principal focus.
Convex mirrors give a virtual, erect, and diminished image of the objects placed in front of it. Because of this, they have a wide field of view. That is why they are used to construct solar furnaces. Concave mirrors converge the light incident on them at a single point known as principal focus. Hence, they can be used to produce a large amount of heat at that point. Q9 :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. Answer : 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 ray of light coming from the object will be refracted by the lower half of the lens. These rays meet at the other side Ncert Solutions Class 10th Physics Chapter Light Quest of the lens to form the image of the given object, as shown in the following figure. Case II 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.
Q10 :An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. Draw the ray diagram and find the position, size and the nature of the image formed. The negative sign shows that the image is real and formed behind the lens. The negative value of image height indicates that the image formed is inverted. The position, size, and nature of image are shown in the following ray diagram.
Q11 :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. This is shown in the following ray diagram. Keep visiting Jagran Josh to get latest updates and reliable study material for preparations of all school and board examinations.
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