The spectrum contains only specific wavelength, It is called _________.
A. Line spectrum
B. Continous spectrum
C. Visible spectrum
D. Invisible spectrum
There are _______ types of Line spectrum.
A. Two
B. Three
C. Four
D. Five
The spectrum contains all wavelengths, it is called ___________.
A. Line spectrum
B. Invisible spectrum
C. Continous spectrum
D. Visible spectrum
The spectrum which can be seen through naked eyes is known as __________.
A. Invisible spectrum
B. Visible spectrum
C. Continous spectrum
D. Line spectrum