3. Joshua Gabriel felt the heat and irritation on his face after long exposure to
sunlight. What caused it?
A. Infrared radiation
C. microwave radiation
B. radio wave radiation
D. gamma radiation
4. Most of the EM waves are invisible to the eyes, EXCEPT
A. Visible light
C. Gamma rays
B. Ultraviolet rays
D. Radiowaves
5. What happens to the visible light when it illuminates a black object?
A. It absorbs all colors in the visible light.
B. It refects all colors in the visible light
C. A only
D. A&B​