Light

We can see a rainbow only when-

1. Our face is towards the Sun
2. Our back is towards the Sun
3. We look at the Sun
4. We look anywhere in the sky

A circular disc with all the seven colours of rainbow painted on it in correct sequence, is called-

1. Circular disc
2. Rainbow disc
3. VIBGYOR disc
4. Newton's disc

Can you identify lenses just by touching?

1. No
2. Yes
3. Only convex lenses
4. Only concave lenses

Reflector of a torch has-

1. Plain surface
2. Concave surface
3. Convex surface
4. Irregular surface

Which of the following mirror is used by the doctors?

1. Convex
2. Plane
3. Concave
4. Both concave and convex

If a small circular disc with seven rainbow colours painted on it is rotated, we see

1. The seven colours rotating in the same sequence
2. The seven colours become brighter
3. Black colour
4. White colour

The correct sequence of seven colours of a rainbow is

1. Blue, Orange, Red, White, Purple, Yellow, Green
2. Violet, Blue, Indigo, Green, Red, Yellow, Orange
3. Red, Orange, Yellow, Green, Blue, Indigo, Violet
4. Red, Orange, Yellow, Green, Violet, Indigo, Blue

Sunlight consists of

1. White colour only
2. Five colours
3. Seven colours
4. Blue colour

Concave lenses are also known as the

1. Diverging lenses because they diverge light
2. Converging lenses because they converge light to a point
3. Diverging lenses because they bend the light outward
4. Only (a) and (c)

The nature and size of an object depend upon

1. The time of conducting the experimenting
2. The position of the object
3. The kind of the object
4. The position of the object in case of mirrors only

Those transparent glasses which feel thinner in the middle than at the edges are

1. Concave lenses
2. Magnifying glasses
3. Used in microscopes
4. Used in telescopes

Those lenses which feel thicker in the middle than at the edges are

1. Convex lenses
2. Diverging lenses
3. Magnifying lenses
4. Magnifying glasses or convex lenses

By using a convex mirror we can see an image that is

1. Real, Inverted and Enlarged
2. Virtual, Erect and Diminished
3. Real, Erect and Diminished
4. Virtual, Erect and Enlarged

By using a concave mirror we can see an image that is

1. Real or Virtual
2. Smaller or larger than the object
3. Inverted or Erect
4. All of these

An image that cannot be obtained on a screen is called a

1. Real Image
2. Virtual Image
3. Erect Image
4. Inverted image

Convex mirror has its reflecting (shining) surface

1. Similar to the inner surface of a spoon
2. Bulging in
3. Both (a) and (b)
4. Neither (a) nor (b)

Concave mirror has its reflecting (shining) surface

1. Bulging in
2. Bulging out
3. Like the outer surface of a spoon
4. Both (b) and (c)

The shape of a mirror can be

1. Plane
2. Convex
3. Concave
4. All the three

In the side mirror of a car the images of all the objects appear

1. Equal to the objects themselves
2. Smaller than the objects themselves
3. Larger than the objects themselves
4. As points

In the image obtained by a plane mirror, left side of the object appears to be

1. On left side of the image
2. On right side of the image
3. On top of the image
4. On bottom of the image

The image can be obtained on a screen, if

1. The screen is placed behind the plane mirror
2. The screen is placed in front of the plane mirror
3. The screen is placed in front or behind the plane mirror
4. The image cannot be obtained on a screen using a plane mirror

The distance of the image from the mirror is

1. More than the distance of object from the mirror
2. Less than the distance of object from the mirror
3. Same as the distance of the object from the mirror
4. None of these

The image formed by a plane mirror will be

1. Larger
2. Erect
3. Inverted
4. Tilted

Size of the image formed by a plane mirror is

1. Of smaller size if the mirror is larger
2. Of smaller size if the mirror is smaller
3. Of same size as the object – does not matter if the mirror is small or large
4. Of larger size if the mirror is larger

Another candle appears behind the mirror when we place a candle of it.

1. The candle behind the mirror is known as the image
2. The candle in front of the mirror is called the object
3. A candle is a candle whether in front or behind the mirror
4. Both (b) and (c)

Objects become visible to us because

1. Light is absorbed by the object
2. Light is reflected by the object before reaching our eyes
3. Objects obstruct the path of light
4. None of these

Direction of reflected light changes if

1. The mirror is rotated slightly
2. The object is moved sideways
3. Both (a) and (b)
4. None of these

The change of direction of light by a mirror is called

1. Beam of light
2. Searchlight
3. Reflection of light
4. Path of light

When light falls on a polished or a shiny surface

1. The light is absorbed by it
2. The direction of light changes
3. The light gets deflected in different directions
4. All of these

You cannot see flame of a lighted candle through a bent pipe, but you can see it through a straight pipe, because

1. Light travels in a straight line
2. Pipe is polished
3. Bent pipe was blocked
4. All of these