Question

In case of metameric samples which one of the following will be identical?

• A. Reflectance curve
• B. Spectral Reflectance curve
• C. \(\Delta\)E values
• D. Tristimulus values

Hint:

Metameric samples have different spectral reflectance curves but identical tristimulus values under one specific light source. Under other light sources, their tristimulus values will be different.

Answer 1

The Correct Option is D

Step 1: Understanding Metamerism: Metamerism is a phenomenon where two colors appear to match under one light source but look different under another light source. This occurs because the two colors have different spectral reflectance curves (the amount of light reflected at each wavelength).
Step 2: Analyzing the Options: Reflectance Curve and Spectral Reflectance Curve: These are the same thing. Metameric samples have different spectral reflectance curves. This is why they appear to match under some lights but not others. If they were same, they won't be called metameric. \(\Delta\)E Values: \( \Delta \)E is a measure of color difference. Metameric samples will have a low \( \Delta \)E under the light source where they match, and a high \( \Delta \)E under other light sources. Tristimulus Values: Tristimulus values (X, Y, Z) are a set of three numbers that describe a color based on the response of the human eye's three types of cone cells. Metameric samples have the same tristimulus values under the specific light source where they match, but different values under other lights. This is the definition of metamerism.