Light, Shadows and Reflections

Non-luminous objects are objects which:



• A) Produce their own light

• B)Do not produce its own light

• C) Can be seen only when light falls o them 

• D) Both (B) and (C)

A transparent object which is mostly used in windows of houses.

• A) polythene

• B) Wood

• C) Glass

• D) Ground glass

Which of the following characteristics are observed in an image formed by a pinhole camera?

• A) Virtual image

• B) Real image

• C) Erect Image

• D) Image of different colour

Which of the flowing is a transparent object?

• A) Cardboard

• B)Tracing paper

• C) Air

• D) Clear glass

Light travels in a:

• A) Circular path

• B) Rectilinear path

• C) Rotational path

• D) Triangular path

Which of the following is not a necessary condition for the formation of a

shadow?

• A) An opaque object

• B) A screen

• C) A transparent object

• D) A source of light

Images of actors on screen in cinema halls are;

• A) Virtual images

• B) Real images

• C) Imaginary images

• D) All the above

We can see any object if:

• A) It is a luminous object.

• B) It reflects the light falling on it.

• C) It is placed in a dark room.

• D) Both [a] and [b]

Opaque objects:

• A) Allow light to pass through them.

• B) Allow light to pass through them partially.

• C) Allow light not to pass through them.

• D) Both [b] and [c]

A very narrow beam of light is called:

• A) Ray

• B) Beam

• C) Candela

• D) All the above