science Chapter 15 n 9 1 what is the path of travelling of light & Give example. Hove can we change the Path of the light. What is reflection of light Give two examples to share 13 the reflection. (l & perform the activity as shown in the video to share the reflection of light ans me
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NCERT Grade 7 Science, Chapter 15, Light begins with an introduction on a beam of light. Thereafter, the properties of light are discussed section wise. The first section talks about the property that light travels in a straight line. This is explained with the help of an activity. In the second section, a reflection of light is discussed wherein, the consequences of light falling on a shiny surface are studied through activities. The concept of an object and an image is covered again with the help of an activity. Apart from this, the properties of the image formed by a plane mirror are also explained. In the next part, spherical mirrors are taken into consideration.
The concept is explained using the activity of observing images from the inner and outer side of the spoon. Two types of the spherical mirror - concave and convex are explained along with a figure. The concept of the real image and virtual image is also covered. In this section, the images formed by a concave and convex mirror for an object placed at different distances from it is to be recorded in a tabular format. In the next part of the chapter, Light, the focus is given on images formed by concave and convex lenses.
At last, the emphasis is given on the understanding that whether the sun is white or coloured which is explained using prism activity whose conclusions are noteworthy.
The sections covered in the chapter, Light are -
Light Travels along a Straight Line
Reflection of Light
Right or Left!
Playing with Spherical Mirrors
Images Formed by Lenses
Sunlight - White or Coloured