Pertanyaan

What is one good point of CR-39 lenses?

It is cheap
It is the lightest
It is not easily scratched
Infrared can not get through it
Ultraviolet can not get through it

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M. Ardini

Master Teacher

Mahasiswa/Alumni Universitas Gadjah Mada

Jawaban terverifikasi

Pembahasan

Berdasarkan kalimat “ CR-39 lenses are the most common plastic lenses due to their low weight, high scratch resistance, low dispersion, and low transparency to ultraviolet and infrared radiation ” yang terdapat pada kalimat ke-2 di paragraf ke-3, dapat diketahui bahwa CR39 memiliki ketahanan terhadap goresan yang tinggi ( high scratch resistance ) sehingga pilihan jawaban (C) adalah yang paling tepat karena CR39 tidak mudah tergores.

Berdasarkan kalimat “CR-39 lenses are the most common plastic lenses due to their low weight, high scratch resistance, low dispersion, and low transparency to ultraviolet and infrared radiation” yang terdapat pada kalimat ke-2 di paragraf ke-3, dapat diketahui bahwa CR39 memiliki ketahanan terhadap goresan yang tinggi (high scratch resistance) sehingga pilihan jawaban (C) adalah yang paling tepat karena CR39 tidak mudah tergores.

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