Through which of the following instrument we can see distant object like the moon, stars and planets clearly?
a) periscope
b) Telescope
c) microscope
d) none of these
Which of the following instrument consists of a hollow tube containing two or more rectangular plane mirrors inclined to each other?
a) periscope
b) Telescope
c) microscope
d) Kaleidoscope
The first kaleidoscope came into being in………,by Sir David Brewster who belonged to Scotland.
a) 1661
b) 1751
c) 1851
d) 1912
There are………..types of Curved mirrors.
a) 2(concave & convex)
b) 3
c) 4
d) 5
When light rays bounce off from a shiny surface: NTS PST 15/12/2019 (3:00)
a) reflection occur
b) absorption occur
c) bending of light occurs
d) nothing happens
Light reflects regularly from a surface which is:
a) opaque and rough
b) rough
c) black
d) smooth and shiny
