Light-Reflection and Refraction

What is the true Nature of Light?

• Particle Nature (made of Photons)

• Wave (Electromagnetic Wave)

• Dual Nature

• None of the above

Laws of Reflection are valid for?

• Plane Mirrors

• Spherical Mirrors

• Cylindrical Mirrors

• All of the above

Which of the following is not a characteristic of the image formed by a plane mirror?

• Image is the same size as that of the object

• Image distance is the same as object distance

• Image is laterally inverted

• Image formed is real.

The centre of the reflecting surface of a spherical mirror is a point called the:

• Focus

• Principal Centre

• Optical Centre

• Pole

The centre of curvature of a concave mirror lies:

• In front of the mirror

• Behind the mirror

• On the Mirror

• None of the above

The Radius of Curvature of a mirror is 36 cm. What is its focal length?

• 9 cm

• 18 cm

• 36 cm

• 72 cm

Rohan holds a concave mirror direct its reflecting surface towards the Sun. He reflects the light on to a sheet of paper held close to the mirror until there is a bright, sharp spot of light. What happens to the paper?

• It becomes whiter

• The paper melts

• The paper starts to burn

• None of these

Which of the following statements is not true:

• Light rays parallel to the principal axis pass through the principal focus of the mirror.

• A ray passing through the centre of curvature of a mirror, after reflection, is reflected back along the same path.

• A ray incident obliquely to the principal axis, towards a point P (pole of the mirror), on the mirror is reflected obliquely, obeying <i = <r

• None of these

An object is placed at the centre of curvature of a concave mirror, which of the following is not a property of the image formed:

• It is Real

• It is diminished

• Object distance = image distance

• It is inverted

What types of mirrors are used in the headlights of a vehicle?

• Concave Mirror

• Convex Mirror

• Plain Mirror

• None of these