Making Black Women Scientists under White Empiricism:The Racialization of Epistemology in Physics W ho is allowed to be an observer in physics, and who is fundamentally denied the possibility? In this article, I propose that race and ethnicity impact epistemic outcomes in physics, despite the universality of the laws that undergird physics, and I introduce the concept of white empiricism to provide one explanation for why. White empiricism is the phenomenon through which only white people (particularly white men) are read has having a fundamental capacity for objectivity and Black people (particularly Black women) are produced as an ontological other. This phenomenon is stabilized through the production and retention of what Joseph Martin calls prestige asymmetry, which explains how social resources in physics are distributed based on prestige. In American society, Black women are on the losing end of an ontic prestige asymmetry whereby different scientists "garner unequal public approbation" in their everyday lives due to ascribed identities such as gender and race (Martin 2017, 475). White empiricism is one of the mechanisms by which this asymmetry follows Black women physicists into their professional lives. Because white empiricism contravenes core tenets of modern physics (e.g., covariance and relativity), it negatively impacts scientific outcomes and harms the people who are othered.White empiricism comes to dominate empirical discourse in physics because whiteness powerfully shapes the predominant arbiters of who is a valid observer of physical and social phenomena. Based primarily on their own This work and its open-access publication have been made possible by FQXi's "Physics of the Observer" Large Grant program. I wish to thank the following for helpful conversations,