JND stands for: Select one:
a. Just noticeable theory
ob. Just noticeable direction
c. Just negotiable difference
d. Just noticeable difference​

LETTER D

Explanation:

Weber's Law, more simply stated, says that the size of the just noticeable difference (i.e., delta I) is a constant proportion of the original stimulus value. ... The Weber fraction equivalent for this difference threshold would be 0.1 (delta I/I = 10/100 = 0.1).

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

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