Question

2. You are looking at yourself in a makeup mirror. When you are close to the mirror, you look upright and huge (helpful when doing your makeup!). As you move away, your image gets even larger, then disappears at about 30cm away from the mirror, then turns upside down and gets smaller as you move even further away. What type of mirror is this makeup mirror? a) convex; b) concave; c) flat; d) not enough information toe Justify your answer. 3. You are standing up to your knees in a stream and you see a fish swimming towards you a short distance away, abot 30 below the horizontal surface of the water. If you want to spear the fish, should you aim a) straight at the fish; b) below the fish; or c above the fish? Explain your answer.

Answer 1

Ans

2)

This is a concave mirror. The image is virtual and upright for distance less than 30 cm (focal length of the mirror). As you move away further it disappears and it turns upside down.

The convex mirror always produce small size and upright image. The flat mirror produces the same size upright image.

3) You should aim below the fish. Due to refraction the fish appear closer than it actually is. To overcome this you aim below the fish.