Questions

In vacuum and in homogeneous, transparent media, such as air, water, and glass, light moves in a straight line. When light encounters a boundary between two different transparent media, some light is reflected and some moves from the first into the second medium.

Vitiligo is a condition in which the skin loses its pigment cells (melanocytes). This can result in discolored patches in different areas of the body, including the skin, hair, retina and mucous membranes.

Many disorders have been linked to vitiligo. They are::

Hashimoto thyroiditis,

Graves disease,

Addison disease and

diabetes mellitus,

alopecia areata,

pernicious anemia,

inflammatory bowel disease,

psoriasis, and

autoimmune polyglandular syndrome.

The country Pakistan declared sugarcane juice as 'National drink'.