## Tuesday, November 9, 2010

### Structure question -( concave mirror)

Percubaan SPM MRSM 2010

Diagram 1 shows an object placed in front of a mirror.
(a) Name the type of mirror shown in Diagram 1.
Namakan jenis kanta yang digunakan dalam Rajah 1.

Hints for solving the problem :
A convex mirror curves outwards.
A concave mirror curves inwards.
(b) Draw the image in the box given in Diagram 1.
Lukiskan imej dalam petak yang disediakan pada Rajah 1.

Hints for solving the problem :
Draw the image with its tail on the axis. The head is where the two reflected rays meet.
convex mirror typically make a virtual image.
A virtual image is shown using a dotted line.

(c) Based on Diagram 1, tick the correct statement about the image formed.
Berdasarkan Rajah 1. tandakan pada pernyataan yang betul mengenai imej yang terbentuk.

[] The image can be formed on a screen.
[] Imej boleh terbentuk pada skrin.
[] The image cannot be formed on a screen.
[] Imej tidak boleh terbentuk pada skrin.

Hints for solving the problem :
Real image can be displaced on a screen.
Virtual image can be seen by the observer but not be displaced on a screen.

(d) What happens to the size of the image if the object is placed at X?
Apakah yang terjadi pada saiz imej jika objek diletakkan pula di X ?
Hints for solving the problem :
The image appears larges in size when the object is nearer to the convex mirror.