Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Mirage is an illustration of
only dispersion of light
only reflection of light
only total internal reflection of light
both refraction and total internal reflection of light
Solder is an alloy of
Cu and Sn
Fe and Zn.
Pb and Sn
Ag and Zn
Twinkling of stars is due to
particular frequencies of the starlight.
reflection of starlight from the oceanic surface
atmospheric refraction of starlight.
magnetic field of Earth.
Which one of the following is not used as a raw material in the manufacture of glass?
Soda
Alumina
Borax
Gypsum
Which one of the following materials is not an allotrope of carbon?
Diamond
Graphene
Fly ash
Fullerene
