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Consider the following statement: A ray of light passing through the optical centre of a convex lens emerges without any deviation after refraction. A ray of light passing through the first principal focus of a convex lens  emerges parallel to the principal axis after refraction. A ray of light passing through the optical centre of a convex lens emerges parallel to the principal axis after refraction. Which one of the following statements INCORRECT?
Consider the following statements about the Atmospheric pressure phenomenon and identify the correct ones. Atmospheric pressure is basically a force in any area pushed by any surface by the weight of the Earth's atmosphere.  The atmospheric pressure increases with an increase in the altitude for any region.  The earth's rotation affects the pressure of the atmosphere in various ways.
Consider the following statements.
1. SI unit of atmospheric pressure is Nm-2 or pascal and CGS unit is dyne/cm2.
2. The barometer is a device by which the atmospheric pressure is measured.
3. The standard atmospheric pressure is the pressure required of 76 cm of Hg column or 760 mm of Hg column, which is equivalent to 1 atm.
Which of the statements given above is/are correct?
Refraction from denser to rare medium for a light ray, the value of angle of refraction at the condition of critical angle is
__________ pulps are of especially high opacity. Fillers tend to have high indices of refraction and provide interfaces for light scattering as well. The very high index of refraction of Ti2 allows thin papers to have high opacity as in the case of bible papers.
__________ means that when light travels from a material of less index of refraction to a material of higher index of refraction, the light is bent towards the normal.
Which of the following is not caused by atmospheric refraction of light ?
Which of the following happens due to atmospheric refraction? I. Twinkling of stars II. Advanced sunrise and delayed sunset
The phenomena for which of the following, atmospheric refraction is not responsible ?
Which of the following phenomena is not caused due to the Atmospheric Refraction of light?