I. Alpha rays

II. Beta rays

III. Gamma rays

A. I only
B. II only
C. III only
D. II and III only
E. I, II and III

Correct Answer:

Option D – II and III only

SEE ALSO  An object is placed 20cm from a lens. If an image is formed on a screen 260cm away from the lens, calculate the magnification of the image.

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