1. sebuah benda tingginya 2,5 cm . terletak 15 cm di depan cermin cekung yang berjari jari kelengkungan 60 cm , berapakah jarak dan tinggi bayangan benda tersebut ? sertakan rumus..!
#SECEPATNYA GAN...
sitiwarda
Titik fokus = 1/2 x jari² kelengkungan cermin = 1/2 x 60 = 30
1/f = 1/s + 1/s' 1/s' = 1/f - 1/s 1/s' = 1/30 - 1/15 1/s' = 1/30 - 2/30 1/s' = - 1/30 s' = -30 jarak bayangan = 30 cm (maya) M = - s'/s = - (-30) / 15 = 30 / 15 = 2 kali pembesaran bayangan = 2 kali
= 1/2 x 60
= 30
1/f = 1/s + 1/s'
1/s' = 1/f - 1/s
1/s' = 1/30 - 1/15
1/s' = 1/30 - 2/30
1/s' = - 1/30
s' = -30
jarak bayangan = 30 cm (maya)
M = - s'/s
= - (-30) / 15
= 30 / 15
= 2 kali
pembesaran bayangan = 2 kali
M = h' / h
2 = h' / 2,5
h' = 2 x 2,5
h' = 5
tinggi bayangan = 5 cm