Question

B. True or false
1. Colour of the shadow depends on the colour of the object.
2. Shadow of an object can look very different from the object.
3. Pinhole camera forms a shadow of an object.
4. All shadows have both umbra and penumbra.
5. Formation of image in a mirror is based on rectilinear propagation of light.​

Answer 1

Answer:

1)Whatever be the colour of an object, the colour of the shadow cast by the object is always black. Therefore, the colour of an object cannot be identified by its shadow. (false)

2)an object can form more than one shadow at a time. If an object is illuminated from more than one direction by lights, we can have more than one shadow. For example, if you are lit from two different directions, you will see two shadows.(true)

3)The image formed by a pinhole camera is inverted compared to the object, but it has the same colour as the object. In addition, the image has all the details of the object. Hence, we can confirm that a pinhole camera forms an image, not a shadow.(false)

Answer 2

Explanation:

1= The color of shadow depends upon the color of light source used. The different object have different shadow. As the distance between light source and object varies the size of shadow also varies.

2= Yes, an object can form more than one shadow at a time. If an object is illuminated from more than one direction by lights, we can have more than one shadow. For example, if you are lit from two different directions, you will see two shadows.

3= The image formed by a pinhole camera is inverted compared to the object, but it has the same colour as the object. In addition, the image has all the details of the object. Hence, we can confirm that a pinhole camera forms an image not a shadow

4= The region of complete shadow is called the umbra and the region of diffuse shadow is called the penumbra. These shadows are formed on the Earth during a solar eclipse and From the umbra we see a total eclipse while from the penumbra only a partial eclipse is visible

5= Effects of rectilinear propagation of light - Formation of shadow, Formation of eclipse, Formation of images, etc TRUE