Light:reflection and refraction

Speed of light in vaccum is

• 3×10¹⁰

• 2.8×10³

• 3×10⁸

• 3×10⁹

The optical phenomena,twinkling of stars is due to

• Atmospheric reflection

• Total reflection

• Atmospheric refraction

• Total refraction

A full length of distant tall building can be seen using

• A convex mirror

• A concave mirror

• A plane mirror

• None of the above

The ratio of the sine of the angle of

incidence to the sine of the angle of refraction

is constant. it is given by ......

• Faraday's law

• Snell's law

• Newton's law

• Murphy's law

Light from the Sun falling on a convex lens

will converge at

• Radius of curvature

• Optical center

• Focus

• None of the above