Class 10 Physics - Light MCQs

Which of the following is a property of light?

• It requires a medium to travel

• It can travel in a vacuum

• It does not refract

• It has infinite speed

What is the speed of light in vacuum?

• 3 x 10^8 m/s

• 3 x 10^6 m/s

• 3 x 10^4 m/s

• 3 x 10^10 m/s

Which mirror is used in vehicle side mirrors?

• Concave

• Convex

• Plane

• None of these

The mirror formula is given by:

• 1/f = 1/v + 1/u

• f = 1/v + 1/u

• 1/f = 1/u - 1/v

• f = v/u

Which lens is used to correct myopia?

• Convex lens

• Concave lens

• Cylindrical lens

• Bifocal lens

The focal length of a plane mirror is:

• Infinity

• Zero

• Equal to radius of curvature

• Cannot be determined

Which type of image is always formed by a convex mirror?

• Real and inverted

• Virtual and erect

• Real and erect

• Virtual and inverted

The power of a lens is measured in:

• Watt

• Joule

• Dioptre

• Meter

The ability of a lens to converge or diverge light is called:

• Reflection

• Refraction

• Power

• Focal length

The radius of curvature of a plane mirror is:

• Infinity

• Zero

• Equal to focal length

• Cannot be determined