The phenomenon easily explained only in terms of the particle model of light is
A) reflection.
B) refraction.
C) photoelectric effect.
D) diffraction.
E) none of the above
Question 2
A camera lens has a focal length of 50.0 mm and an aperture setting of 4.00. What is the aperture diameter of this lens?
A) 12.5 mm
B) 10.1 mm
C) 13.6 mm
D) 14.2 mm
E) 15.0 mm