# Kuis Cahaya Dan Alat Optik 1

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| By Lynnuha
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Lynnuha
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Quizzes Created: 1 | Total Attempts: 692
Questions: 8 | Attempts: 692

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PADA QUIZ INI, ANDA AKAN BERLATIH MENGRJAKAN SOAL TENTANG CAHAYA DAN ALAT OPTIK SOAL TERDIRI DARI SOAL PILIHAN GANDA, MENJODOHKAN, BENAR-SALAH, DAN ESAY.. SELAMAT MENGERJAKAN,, AND ENJOY...

• 1.

• 2.

### Titik jauh penglihatan seseorang 100 cm di muka mata. Agar bisa melihat benda-benda yang sangat jauh orang ini memerlukan kacamata dengan lensa yang kuat lensanya . . . .

• A.

0,1 dioptri

• B.

-1 dioptri

• C.

0,3 dioptri

• D.

3 dioptri

B. -1 dioptri
Explanation
The person's far point of vision is 100 cm, which means they can see objects clearly up to a distance of 100 cm without any visual aid. To see objects that are farther away, they would need glasses with a lens that can provide additional focusing power. Since the answer is -1 dioptri, it suggests that the person needs a lens with a negative power to correct their vision and enable them to see distant objects clearly.

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• 3.

### Seorang penderita rabun dekat dengan titik dekat 50 cm ingin membaca pada jarak baca normal. Jenis lensa kacamata yang harus digunakan dan jarak fokusnya adalah . . . .

• A.

Cembung, fokus 50 cm

• B.

Cekung, fokus 30 cm

• C.

Cembung, fokus 52cm

• D.

Rangkap, fokus 33,3 cm

A. Cembung, fokus 50 cm
Explanation
The correct answer is cembung, fokus 50 cm. This is because a person with nearsightedness (rabun dekat) needs a convex lens to correct their vision. A convex lens helps to diverge the light rays before they enter the eye, allowing the person to see objects at a normal reading distance. The focal length of the lens should be equal to the distance at which the person wants to read, which in this case is 50 cm.

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• 4.

### Seekor ikan yang berada dalam kolam terlihat lebih dekat dibandingkan dengan keadaan sebenarnya. Hal ini disebabkan sinar yang keluar dari air ....

• A.

• B.

• C.

Dipantulkan menjauhi garis normal

• D.

Tidak mengalami pembiasan

Explanation
Sinar yang keluar dari air ketika melewati permukaan air-udara mengalami pembiasan. Pembiasan ini membuat objek yang berada di dalam air, seperti seekor ikan dalam kolam, terlihat lebih dekat dari keadaan sebenarnya ketika diamati dari luar air. Oleh karena itu, sinar yang keluar dari air dibiaskan mendekati garis normal.

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• 5.

### Salah satu cacat mata yang penderitanya tidak mampu melihat garis-garis horizontal dan vertikal secara simultan dinamakan astigmatisma.  Penderita astigmatisma dapat ditolong dengan menggunakan lensa silindris

• A.

True

• B.

False

A. True
Explanation
Astigmatism is a visual condition where the individual is unable to see horizontal and vertical lines simultaneously. This can be corrected by using cylindrical lenses. Therefore, the statement "Penderita astigmatisma dapat ditolong dengan menggunakan lensa silindris" is true.

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• 6.

### Sifat bayangan yang dibentuk oleh cermin datar adalah maya berlawanan arah, tegak, sama besar

• A.

True

• B.

False

A. True
Explanation
The statement is true because when an object is placed in front of a flat mirror, the image formed is virtual, upright, and of the same size as the object. The image appears to be behind the mirror, hence it is said to be "opposite" or "reversed" in direction. Additionally, the image is erect or upright, meaning it is not flipped or inverted.

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• 7.

• A.

True

• B.

False