Which of the Following Rays Are the Least Penetrating

question 120

Multiple Choice

Which of the following rays are the least penetrating?

• A) α rays
• B) β rays
• C) γ rays
• D) β⁺ rays

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Definitions:

Difference Threshold

The minimum change in stimulation required to detect a difference between two stimuli, also known as the just noticeable difference (JND).

Heavier Objects

Objects with greater mass or weight compared to other items in their comparison set.

Weber's Law

A principle in psychology stating that the change in a stimulus that will be just noticeable is a constant ratio of the original stimulus.

Afterimage

An afterimage is a visual impression that persists as a negative or positive image on the retina after the stimulus that caused it is no longer present.