Seorang tukang arloji bermata normal menggunakan lup yang berkekuatan 20 dioptri. Tentukanlah jarak benda ke lup dan perbesaran anguler lup jika mata tukang arloji berakomodasi maksimum ....
Latihan Soal

Quiz
•
Physics
•
12th Grade - University
•
Hard

Eka Nurlita Budiarti ekanurlitab30@gmail.com
Used 2+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
5 Kali
6 Kali
. 7 Kali
8 Kali
9 kali
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Penjelasan Jawaban :
Diketahui = s’ = -Sn = - 25 cm (mata normal)
P = 20 dioptri -> f = 1/P = 1/20= 0,05 m = 5 cm
Ditanya = s dan M untuk mata berakomodasi maksimum
Dijawab =
Menentukan jarak benda ke lup.
1/f = 1/s + 1/s'
1/4 = 1/s + 1/-25
1/s = 1/5 + 1/25
1/s = 5+1/25 = 6/25
s = 25/6 =4.167
Menentukan Perbesaran Anguler Lup
M= sn/f + 1
M = 25/5+1
M = 5+1 = 6 kali
5 Kali
6 Kali
7 Kali
8 Kali
9 kali
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Seseorang yang mempunyai titik dekat 80 cm ingin melihat sebuah benda dengan lup. Apabila orang tersebut saat berakomodasi maksimum menginginkan terjadinya perbesaran sebesar 5 kali, jarak focus lup yang harus digunakan ialah ... (dalam cm).
5
10
15
20
25
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Penjelasan Jawaban :
Diketahui : Sn = 80 cm
M = 3 kali
Ditanya : f ... ?
Jawab :
M = sn / f + 1
S = 80/f + 1
4 = 80/f
f = 20 cm
5
10
15
20
25
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebuah teropong dipakai untuk melihat bintang yang menghasilkan perbesaran anguler 6 kali. Jarak lensa obyektif terhadap lensa okuler 35 cm. Teropong digunakan dengan mata tidak berakomodasi. Jarak fokus okulernya adalah ….
3,5 cm
. 5 cm
7 cm
10 cm
12,5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Penjelasan Jawaban :
Diketahui : M = 6 Kali
d = 35
Ditanya : fok .... ?
Dijawab :
d = fob + fok
35 = fob + fok
fob = 35 - fok
M = fob/fok
6 = 35 -fok/fok
7fok = 35
fok = 5 cm
3,5 cm
5 cm
7 cm
10 cm
12,5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebuah mikroskop memiliki panjang fokus lensa objektif dan okuler masing masing10 cm dan 5 cm. Jika jarak antara lensa objektif dan okuler 35 cm dan mata tidak berakomodasi, maka perbesaran total mikroskop adalah … .
10 kali
12 kali
15 kali
18 kali
20 kali
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