Shadow

Q.

what is zero shadow day

Q. Shadows are formed when light is blocked by some object.

1. True

2. False

Q. What are the factors that affect the size of a shadow?

1. The color of the object.
2. The distance of the source of light from the object.
3. The angle at which the light rays fall on the object.
4. The size of the opaque object.

Q.

What are the characteristics of shadow?

Q. The day on which the sun reaches exactly overhead is called:

1. Zero shadow day
2. Solar eclipse
3. Lunar eclipse
4. Occultation

Q.

What is demonstrated by Newton’s colour disc?

Q.

Can transparent objects caste a shadow?

Q.

What are the factors that affect the size of a shadow?

1. the color of the object

2. the distance of the source of light

3. the angle at which the light rays fall on the object

4. the size of the opaque object

Q. Shadows:

1. always smaller than the object.
2. are always bigger than the object.
3. remains the same size as the object.
4. can be smaller or bigger or same as compared to the object.

Q.

Which type of objects do not cast shadows?

1. Transparent object

2. Translucent object

3. Opaque object

4. 2-Dimensional object

Q.

Which type of object does cast a shadow?

1. Transparent object

2. Translucent object

3. Opaque object

4. 2-Dimensional object

Q.

Size of shadow depends on

1. Distance between source of light and object

2. Angle of incidence

3. Size of object

4. None of the above

Q. Whenever light falls on an opaque object, a shadow always appears on the background.

1. False
2. True

Q. The phenomenon of bouncing back of light is known as __________ of light.

1. reflection
2. refraction
3. diffraction
4. dispersion

Q.

Light is necessary for the formation of a shadow.

1. Glass

2. Mirror

Q.

On what factor(s) does the darkness of the shadow cast by an object depend on?

1. Distance of the object from the surface

2. Opacity of the object

3. Dimension of the object

4. Both A and B

Q.

Birds flying high in the sky do not cast their shadow on the ground.

Q.

A football is placed in the path of light as shown below. If the light source is horizontally placed, what will be the shape of the shadow cast by it on the vertical screen?

1. Cylindrical

2. Circular

3. Square

4. Spherical

Q.

What can you say about the edges of the shadow?

1. They are blurry but distinct

2. None of these

3. They are sharp and distinct

4. They are different from the object

Q. What are the parameters to change size of the shadow?

1. Different time intervals

2. The size of shadow cannot be changed.

3. Distance between the object and the source of light.

4. Distance between the object and the shadow.

Q.

Differentiate between a shadow and an image.

Q.

Can the position of the Sun in the sky will help Sandy to work out what time it is?

1. False
2. True

Q. Whenever light falls on an opaque object, a shadow will always be observed in the background.

1. False
2. True

Q.

Area where light is blocked by an opaque object is called ____ .

1. white

2. black

3. same as color of the light
   

4. same as color of the object

Q. The size and darkness of a shadow depends on the relative position of the light source and the object, as well as the type of the object.

1. False
2. True

Q.

whay does a bird flying high do not cast a shadow?

Q. What is formed when an opaque object obstructs the path of light?

1. Image
2. Reflection
3. Mirage
4. Shadow

Q.

Pick the odd-one out. Give scientific reason for your answer.

1. Solar eclipse

2. Lunar eclipse

3. Full moon night

4. Annular eclipse

Q.

Among the following situations, which will have more than one shadow of an object at a time?

1. None of the above.

2. When a person is walking in the daylight.

3. Shadows of the hockey players at night in a stadium.

4. When a person is standing under a street light​.

Q.

Size of the shadow ___ the size of the object.

1. Because no light reaches on screen in area where shadow form

2. The colour of object is colour components of light that reflect

3. In Sunlight, the object becomes black

4. Both B & C