6a5m - pembiasan gelombang, maksud muka gelombang

2     Diagram 2 shows the plane wave fronts produced when water wave moves from region P to region Q. The frequency of waves is 10 Hz.

       Rajah 2 menunjukkan muka gelombang satah yang terhasil apabila satu gelombang air bergerak dari kawasan P ke kawasan Q. Frekuensi gelombang itu ialah 10 Hz.

(a)          What is the meaning of wave fronts?

Apakah maksud muka gelombang?

………………………………………………………………………….........………

[1 mark]

[1 markah]

(b)     (i)    Which region is deeper?

Kawasan manakah yang lebih dalam?

..............…………………………………………………………………………

[1 mark]

              [1 markah]

 (ii)  Give one reason for the answer in 2 (b)(i).

Beri satu sebab bagi jawapan di 2 (b)(i).

………………………..............…………………………………………………

[1 mark]

[1 markah]

(b)   Calculate  the speed of waves in region Q.

Hitung laju gelombang di kawasan Q.

[2 marks]

[2 markah]

JAWAPAN : 

Question	Answer	Mark
2.a	The line that joining all points in phase	1
2.b.i	Region P	1
2.b.ii	Wave length higher/longer // Distance between the two consecutives wave front is more/bigger	1
2.c	M1  λ  =  0.06  // 0.02 3 M2  v  =  10 x 0.02 // 0.2 ms-1	1 1
Total		5