The blue colour of clear sky is due to_______________?

Related Mcqs:

1. An astronaut sees the colour of the sky as: _________?

   A. Blue
   B. White
   C. Red
   D. Black

   Submitted by: Abid Hussain

2. The sky appears blue because the earth’s atmosphere __________?

   A. Scatters blue light
   B. Reflects blue light
   C. Transmits blue light
   D. Has actual blue cover

3. Why the colour of the Ocean appears blue?

   A. Because the sunlight falling on it is scattered.
   B. Because the sunlight falling on it is absorbed.
   C. Because the sunlight falling on it is refracted.
   D. Because the sunlight falling on it is reflected.

   Submitted by: Rashid Mehmood

4. The blueness of the sky is mainly due to _____________?

   A. The scattering of sunlight by air molecules
   B. The presence of water vapor
   C. Absorption of blue light by the air
   D. Emission of blue light by the atmosphere

   Submitted by: Mansoor Ul Haque

5. Stars in the sky appear to twinkle due to _________?

   A. a series of refractions
   B. a series of reflections
   C. a surface tension phenomenon
   D. multiple diminishing brightness

   Submitted by: Abid Hussain

6. The yellow colour in photochemical smog is due to the presence of____________?

   A. Sulphur dioxide
   B. Carbon dioxide
   C. Nitrogen dioxide
   D. CFC’s

   Submitted by: Palestine

7. The most splendid and the most magnificent constellation on the sky is?

   A. Orion
   B. Columbia
   C. Canis Major
   D. Taurus
   E. None of these

8. Which one is the brightest star in the night sky?

   A. Betelgeuse
   B. Sirius
   C. Rigel
   D. Polaris

   Submitted by: Mansoor Ul Haque

9. Which planet looks reddish in the night sky ?

   A. Jupiter
   B. Saturn
   C. Mars
   D. MercurY

   Submitted by: Muhammad Umar Abbas

10. Red-green colour blindness in a man is known as:

    A. Prolanopia
    B. Deuteranopia
    C. both a&b
    D. Marfan’s syndrome

    Submitted by: Tasawar Hussain channa