Question

Bantu dan pakai cara ya. please

Answer 1

1) L = (2*n-1)*lamda/4
15 cm = (2*1-1)*lamda/4
lamda = 60 cm = 0,6 m

V = lamda*frekuensi
= 0,6*375 = 225 m/s

2) s = 8 m
s' = -24 m (krn di depan lensa)
P = (s+s')/(s*s')
= {8+(-24)}/{8*(-24)} = 1/12 dioptri = 0,083 dioptri