Roboguru

Suatu benda hitam mempunyai suhu 2.900 K. Jika benda tersebut didingingkan, panjang gelombang yang bersesuaian dengan energi pancar maksimum berubah 9 pm. Berapa suhu benda setelah didinginkan ?

Pertanyaan

Suatu benda hitam mempunyai suhu 2.900 K. Jika benda tersebut didingingkan, panjang gelombang yang bersesuaian dengan energi pancar maksimum berubah 9 pm. Berapa suhu benda setelah didinginkan ?

Pembahasan Soal:

Diketahui

begin mathsize 14px style T subscript 1 equals 2.900 space straight K increment lambda equals 9 space pm equals 9 cross times 10 to the power of negative 12 space end exponent straight m end style

Ditanyakan begin mathsize 14px style T subscript 2 end style

Penyelesaian

Gunakan persamaan Pergeseran Wien

begin mathsize 14px style increment lambda equals lambda subscript 1 minus lambda subscript 2 increment lambda equals fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator T subscript 1 end fraction minus fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator T subscript 2 end fraction increment lambda equals fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator T subscript 1 end fraction minus fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator T subscript 2 end fraction 9 cross times 10 to the power of negative 12 end exponent equals fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator 2900 end fraction minus fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator T subscript 2 end fraction 9 cross times 10 to the power of negative 12 end exponent equals 1 cross times 10 to the power of negative 6 end exponent minus fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator T subscript 2 end fraction 9 cross times 10 to the power of negative 12 end exponent minus 1 cross times 10 to the power of negative 6 end exponent equals negative fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator T subscript 2 end fraction minus 9 comma 99 cross times 10 to the power of negative 7 end exponent equals negative fraction numerator 2 comma 9 cross times 10 to the power of negative 3 end exponent over denominator T subscript 2 end fraction T subscript 2 equals 2874 comma 1 space straight K end style

Dengan demikian suhu benda setelah didinginkan adalah 2874,1 K

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 15 Maret 2021

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Ruangguru

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ikuti Kami

©2021 Ruangguru. All Rights Reserved