NCERT Solutions Class 7 Science Chapter 15 Light – Here are all the NCERT solutions for Class 7 Science Chapter 15. This solution contains questions, answers, images, explanations of the complete chapter 15 titled Light of Science taught in class 7. If you are a student of class 7 who is using NCERT Textbook to study Science, then you must come across chapter 15 Light. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 7 Science Chapter 15 Light in one place.
NCERT Solutions Class 7 Science Chapter 15 Light
Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Science for Class 7 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.
For a better understanding of this chapter, you should also see summary of Chapter 15 Light , Science, Class 7.
| Class | 7 |
| Subject | Science |
| Book | Science |
| Chapter Number | 15 |
| Chapter Name |
Light |
NCERT Solutions Class 7 Science chapter 15 Light
Class 7, Science chapter 15, Light solutions are given below in PDF format. You can view them online or download PDF file for future use.
Light
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Question & Answer
Q.1: Fill in the blanks:
(a) An image that cannot be obtained on a screen is called ____________.
(b) Image formed by a convex __________ is always virtual and smaller in size.
(c) An image formed by a __________ mirror is always of the same size as that of the object.
(d) An image which can be obtained on a screen is called a _________ image.
(e) An image formed by a concave ___________ cannot be obtained on a screen.
Ans : (a) An image that cannot be obtained on a screen is called virtual image. A virtual image cannot be obtained on a screen. Only real images can be obtained on a screen. (b) Image formed by a convex mirror is always virtual and smaller in size. A convex mirror forms a virtual, diminished and upright image of an object. (c) An image formed by a plane mirror is always of the same size as that of the object. (d) An image which can be obtained on a screen is called a real image. Only real images can be obtained on a screen. (e) An image formed by a concave lens cannot be obtained on a screen. The image formed by concave lens is always virtual. A virtual image cannot be obtained on a screen.
Q.2: Mark ‘T’ if the statement is true and ‘F’ if it is false:
(a) We can obtain an enlarged and erect image by a convex mirror. (T/F)
(b) A concave lens always form a virtual image. (T/F)
(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T/F)
(d) A real image cannot be obtained on a screen. (T/F)
(e) A concave mirror always form a real image. (T/F)
Ans : (a)False The image formed by a convex mirror is always virtual, diminished and erect. (b) True The image formed by a concave lens is always virtual, erect and diminished. (c) True The image formed by a concave mirror can be real or virtual, enlarged or diminished, and erect or inverted, depending upon the distance of the object from the mirror. (d) False The image that can be obtained on a screen is called a real image. Virtual images cannot be obtained on a screen. (e) False A concave mirror can form both real and virtual images. The nature of the image depends on the distance of the object from the mirror.
Q.3: Match the items given in Column I with one or more items of Column II.
Ans : (a) (v) A plane mirror forms an image which is erect and of the same size as the object. (b) (ii) and (vi) A convex mirror forms a virtual, diminished, and upright image and therefore, covers a larger area of view. Its field of view is very large. (c) (i) A convex lens can form a magnified image of the object. Therefore, it is used as a magnifying glass. (d) (iii) A concave mirror forms an enlarged image of the object. Therefore, it is used to see an enlarged image of teeth by the dentist. (e) (vi) The image formed by a concave lens is always virtual, upright and erect.
Q.4: State the characteristics of the image formed by a plane mirror.
Ans : The image formed by a plane mirror is erect, laterally inverted, and of the same size as that of the object. The left side of the object appears on the right side of the image. Also, the distance of the image from the plane mirror is same as the distance between the plane mirror and the object.
Q.5: Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
Ans : If the letters of English alphabet A, H, l, M, O, T, U, V, W, X, Y are kept in front of a plane mirror, then they would form images which exactly look like the original letters of the alphabet. These letters are vertically symmetric. For example, if we divide letters A and U in the middle, then we would find that the right halves are equivalent to the left halves of the letters.Hence, even if the image interchanges sidewise, it will appear same as the letter.
NCERT / CBSE Book for Class 7 Science
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