A__________is a quantum of electromagnetic energy that carries an amount of energy that depends inversely on its wavelength.
A) wave
B) photon
C) grating
D) fringe
Question 2
The magnifying power of a telescope with a primary lens of focal length 1 m and an eye piece of 0.5 m focal length is _____.
A) 2
B) 5
C) 8
D) 10