🔍 Free Preview — first 3 questions
Question 1
The photoelectric effect demonstrates the:
AWave nature of light
BParticle nature of light (photons)
CInterference of light
DDiffraction of light
Question 2
Which type of radioactive radiation is most penetrating?
AAlpha particles
BBeta particles
CGamma rays
DX-rays
Question 3
The half-life of a radioactive isotope is 20 years. After 60 years, the fraction remaining is: