Noun:

గ్లాసెస్ స్పెక్ట్రస్కోస్కోప్,

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.

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

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

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.