PB | Class7 | Science | Chapter 15 | Parkash _05 (PSEB)

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In Class 7 Science, Chapter 15 of the PSEB syllabus, students will learn about light and its properties. The chapter is titled "Parkash," which translates to "Light" in English.

The chapter begins with an introduction to light and its sources, including natural sources like the sun and artificial sources like lamps and bulbs. Students will learn about the properties of light, including its ability to travel in straight lines, reflect, and refract.

Next, the chapter delves into the concept of reflection, including the laws of reflection and the formation of images in mirrors. Students will learn about the different types of mirrors, including plane mirrors and convex and concave mirrors, and their applications in daily life.

The chapter also covers the topic of refraction, including the laws of refraction and the behavior of light when it passes through different mediums, such as air, water, and glass. Students will learn about the formation of images in lenses and the different types of lenses, including convex and concave lenses.

The final section of the chapter discusses the human eye and its working mechanism. Students will learn about the different parts of the eye, including the retina and the lens, and how they work together to form images. The chapter also covers common vision problems and their corrective measures, including the use of glasses and contact lenses.

Overall, this chapter provides a comprehensive overview of light and its properties, including practical applications and its role in human vision.


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