Racism ? Curiousity?

Hey y'all! I'm Jazz (19F) and I am from India. I've noticed that whenever I go out I see people staring at me ( mostly white old people) and when I look back at them they look away. I am lowkey confused why I get stares ? Is it because they're racist? Or are they just curious?( Cuz back in my country some people tend to stare at foreigners not because they're racist but because they're curious? ( I know its really weird) ) OR are they just checking me out ? I want to know what people of hat actually think about other races? I've friends from different cultures and ethnicity at school and I've never faced this in school . It only happens whenever I got out . Also, I am sorry for any grammatical mistakes, English isn't my first language.