Ultraviolet light is the invisible part of the spectrum beyond violet. It has useful applications like curing skin diseases and detecting counterfeit money, but can also be harmful to humans. It is widely used by banks to identify customer signatures on documents under UV light. Prolonged exposure to UV light can cause blindness or skin cancer. While it can treat some skin diseases, it is also very harmful to the skin in large doses. Excessive unprotected sun exposure should be avoided.

1. Disusun oleh :
Fitri Agustina (08)
Hariyani Ayu Purwanti (09)
ImroatisSyaidah (10)
Mery Eka Wahyuni (13)
XII IPA 3
SMA N 3 PROBOLINGGO

2. Explanation is a text which tells
processes relating to forming natural ,
social , scientific and cultural
phenomena. To explain the processes
involved in the information or
working of natural or socio-cultural
phenomena.

3. General Statement
Ultraviolet light means the invisible part of
the spectrum beyond violet. This light has
always been regarded as very useful because it
is used to cure certain skin diseases, kill
bacteria, detect counterfeit money, from
vitamins, etc.

4.  Sequenced Explanation
Along with the increasingly extensive use of computers in
financial activities, ultraviolet light has been widely applied by
banks to identify the signatures of the costumers in passbook.
When the card is removed, the trace of his signature will be
left; this can be used to compare with the signature on the
customer’s withdrawal slip under ultraviolet light.
Ultraviolet light certainly has many practical applications,
but it may also be harmful to human being on some occasions.
To everyone’s knowledge, the direct impact of the light on the
yes for an excessive length of time may blind a person.
Even though it can cure certain skin disease, it is also very
harmful to the skin. A study just completed in the United States
says that the light may cause skin cancer. The ultraviolet rays
of the sun have been ranked as the third most dangerous
cancer-causing agent after alcohol and tobacco.

5.  Closing / Conclusion
It is high time to warn sun-worshippers in
the quest for a bronzed look to be careful of
excessive and uncontrolled exposure to the
sun.

6. Ultraviolet
Ultraviolet light means the invisible part of the spectrum beyond violet.
This light has always been regarded as very useful because it is used to
cure certain skin diseases, kill bacteria, detect counterfeit money, from
vitamins, etc.
Along with the increasingly extensive use of computers in financial
activities, ultraviolet light has been widely applied by banks to identify the
signatures of the costumers in passbook. When the card is removed, the
trace of his signature will be left; this can be used to compare with the
signature on the customer’s withdrawal slip under ultraviolet light.
Ultraviolet light certainly has many practical applications, but it may
also be harmful to human being on some occasions. To everyone’s
knowledge, the direct impact of the UV light for an excessive length of time
may blind a person.
Even though it can cure certain skin disease, it is also very harmful to
the skin. A study just completed in the United States says that the light may
cause skin cancer. The ultraviolet rays of the sun have been ranked as the
third most dangerous cancer-causing agent after alcohol and tobacco.
It is high time to warn sun-worshippers in the quest for a bronzed look
to be careful of excessive and uncontrolled exposure to the sun.

7. Ultraviolet
Sinar ultraviolet berarti bagian yang tak terlihat dari spektrum luar violet. Cahaya ini
selalu dianggap sangat berguna, karena digunakan untuk menyembuhkan penyakit kulit
tertentu, membunuh bakteri, mendeteksi uang palsu, dari vitamin, dll.
Seiring dengan penggunaan yang semakin luas komputer dalam kegiatan keuangan,
sinar ultraviolet telah banyak diterapkan oleh bank untuk mengidentifikasi tanda tangan
dari pelanggan di buku tabungan. Ketika kartu dihapus, jejak tanda tangannya akan
ditinggalkan, ini dapat digunakan untuk membandingkan dengan tanda tangan pada slip
penarikan pelanggan di bawah sinar ultraviolet.
Sinar ultraviolet tentu memiliki banyak aplikasi praktis, tetapi juga dapat
membahayakan manusia pada beberapa kesempatan. Untuk pengetahuan semua orang.
Dampak langsung dari cahaya UV untuk jangka waktu yang berlebihan dapat membutakan
seseorang.
Meskipun dapat menyembuhkan penyakit kulit tertentu, hal ini juga sangat berbahaya
bagi kulit. Sebuah studi baru saja menyelesaikan di Amerika Serikat mengatakan bahwa
cahaya dapat menyebabkan kanker kulit. Sinar ultraviolet dari matahari telah menjadi agen
penyebab kanker yang paling berbahaya yang ketiga setelah alkohol dan tembakau.
Sudah saatnya untuk memperingatkan pecinta matahari yang suka berjumar dalam
upaya membuat kuliat kemerah hitaman untuk berhati-hati terhadap paparan berlebihan
dari tidak terkendali dari matahari.