The colours of stars depend on their
(a) Radius
(b) Atmospheric pressure
(c) Temperature
(d) Distance
Answer:
Line spectrum is given by
(a) Electric bulb
(b) Candle
(c) Mercury vapour lamp
(d) Sun
Answer:
Image formal by a convex spherical mirror is
(a) Inverted
(b) Enlarged
(c) Real
(d) Virtual
Answer:
For an astronaut in a space ship, the sky appearas
(a) Green
(b) blue
(c) Black
(d) White
Answer:
Who firstly predicated the existence of electromagnetic waves?
(a) Marconi
(b) Newton
(c) Maxwell
(d) Hertz
Answer:
Which of the following is the example of ideal black body
(a) A pin hole box
(b) Kajal
(c) Black board
(d) None of these
Answer:
The speed of light with the rise in the temperature of the medium
(a) Decreases
(b) Increases
(c) Drops suddenly
(d) Remains unaltered
Answer:
The Mongol invader Qutlugh Khwaja invaded India during the reign of
(a) Ghiyasuddin Tughlaq
(b) Alauddin Khalji
(c) Jalaluddin Khalji
(d) Balban
Answer:
The first Turkish conqueror to cross the Vindhyachala ranges was
(a) Alauddin Khalji
(b) Firuz Shah Tughlaq
(c) Iltutmish
(d) Balban
Answer:
The silver coin "Rupaya" was first issued by
(a) Akbar
(b) Sher Shah Suri
(c) Sikandar Lodi
(d) Humayun
Answer: