WALA: LIGHT CHANGES DIRECTION

WALA: LIGHT CHANGES DIRECTION

L.O: to explore why a beam of light changes direction when it is reflected from a surface.

INTRODUCTION

Have two soccer balls.

Choose two students.

Ask them to bounce as shown on the two photos.

Choose two other students and do the same.

EXPLANATION

If Ann throws a ball down, it bounces straight back at him.

In the second picture, Ann throws a ball at an angle and it bounces off the floor at the same angle away from him.

When bouncing a ball, the angle the ball makes when it hits the ground looks the same as the angle it bounces off the ground again.

Explain

A ray – a line that light travels in.

Angle- the number of degrees between a horizontal and a line.

Light reflects off a mirror in a similar way.

Light reflects from a mirror at the same angle as it arrives.

The picture shows how light travels when it reflects with lines and arrows.

(draw the picture)

Conclusion

End the lesson by asking oral questions