General Science – Exercise – 3

111. Very small time intervals are accurately measure by

(a) White dwarfs
(b) Quartz clocks
(c) Atomic clocks
(d) Pulsars

112. The dark lines in the solar spectrum are due to

(a) absorption of corresponding wavelengths by the outer layers of the sun
(b) destructive interference between waves of certain definite wavelengths
(c) absorption of corresponding wavelengths by the prism used in the photograph
(d) absence of corresponding wavelengths from the light emitted by the core of the sun

113. Which of the following shows the masses of the three elementary particles in decreasing order?

(a) Leptons, Baryons, Mesons
(b) Mesons, Baryons, Leptons
(c) Baryons, Mesons, Leptons
(d) Leptons, Mesons Baryons

114. Mesons are found in

(a) Laser beam
(b) X-rays
(c) Gamma rays
(d) Cosmic rays

115. The wavelength of X-rays is of the order of

(a) 10 micron
(b) 1 angstrom
(c) 1 cm
(d) 1 m

Related Posts