This paper could be helpful for you : Beer, S. (2015, April). Digital heritage museums and virtual museums. In Proceedings of the 2015 Virtual Reality International Conference (pp. 1-4).

Stephane

Dear Sunera Imtiaz Syeda , on this website there are some interesting answers https://evemuseografia.com/2019/11/15/museo-real-vs-museo-virtual-vs-museo-en-linea/

Virtuality in Digital Museums is studied as the way to transmit heritage in a digital medium. The notion of virtuality is dissociated from its technological sense to be investigated with its full philosophical meaning. Three ways of virtualizing are put into focus. An analogous kind of museography makes real museums simulations, giving perceptual values and mixing virtuality with the illusion of being in the presence of the "real thing". A documentary kind of museography based on computer technology communication and on indexical function of images, integrates Digital Museums as a part of the virtual means of brick and mortar museums. A third way of virtualizing is seen through use of an information visualization landscape metaphor. Virtuality is achieved directly through making logical order in 3D space with digital images specific aesthetics capacity.

Dear Sunera Imtiaz Syeda,

The answer may vary depending on whom you ask. Museologists, information scienctists and computer scientists have quite different perspectives when using the same terms. Maybe you find my paper "The virtual museum: an overview of its origins, concepts, and terminology." helpful.