Learn Science [Form 2]

YOU ARE READING

Random

This book is not a story. This book is a study book for those who likes to study science. I put this way for those who are so lazy to study in their actual books. So, yeah. Hope this book helps you for your knowledge about science. Actually, the les...

#chapter #educational #learn #lesson #science #study

Chapter 1 - Lesson 7 part 1

Start from the beginning

by CutieKittyMe

Figure 1.17 A periscope

(a) Periscopes are used in submarines to observe objects outside the submarine.
(b) The two mirrors in the periscope are tilted at an angle of 45°.
(c) Light rays from an object falls onto mirror X. These are reflected onto mirror Y. The light is then reflected again and enters the observer's eye (Figure 1.17).

2 Kaleidoscope

Figure 1.18 A kaleidoscope

(a) A kaleidoscope forms beautiful images when pieces of paper of various colours are put inside it.
(b) Light from the pieces pf paper fall onto the mirrors.
(c) This light is reflected from the mirrors in the inner walls and forms multiple colourful images.

3 Mirror

Photo 1.3 A dentist's mirror

(a) A dentist uses a mirror when examining a patient's teeth.

Figure 1.19 A mirror around a bend reflects light

(b) A convex mirror is placed at a bend on the road so that drivers can see around the bend.

Refraction of light

1 The refraction of light is the bending of light as it passes from one transparent medium to another. This happens when light travels through different media such as air, water and glass.