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9. Ray optics abd optical instruments — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics9. Ray optics abd optical instruments1 Mark
MCQ
Stars are not visible in the day time because
  • A
    Stars hide behind the sun
  • B
    Stars do not reflect sun rays during day
  • C
    Stars vanish during the day
  • ✓
    Atmosphere scatters sunlight into a blanket of extreme brightness through which faint stars cannot be visible
✓

Answer

Correct option: D.
Atmosphere scatters sunlight into a blanket of extreme brightness through which faint stars cannot be visible
d
During the night time the sunlight doesn't complete reach the part of earth we are residing in. Hence, the sky is darker compared to day time. So, the visibility of the stars increases and we can see them properly.

During the day time, the sunlight reaches the part of earth we are residing in directly. The particles present in the atmosphere causes the phenomenon of atmospheric scattering which causes the sunlight to scatter brightly across the sky. This brightness are so high that the light emitted by the stars are completely covered by the sunlight. Hence, we cannot see the stars in daytime.

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