Noun:

প্রিজম বর্ণালীবীক্ষণ,

prism spectroscope's Usage Examples:

observing the Orion nebula with his 16½-inch telescope and three prism spectroscope and found that the chief nebular line was sharp under all circumstances.

Most of the work was performed with the two prism spectroscope, which had a lower limit of about magnitude 7.

enabled him to foster the development of instruments such as the prism spectroscope and the ProportionScope.

astronomer Hugh Newall had observed its composite spectrum with a four prism spectroscope attached to a 25 inches (64 cm) telescope at Cambridge in July 1899.