Shadows and Images

Q.

Give reason.
A virtual image cannot be obtained on a screen.

Q.

Why is shadow black in colour?

Q. In case of a image, the reflected rays seem to meet each other at a certain point.

1. real
2. virtual
3. diminished
4. enlarged

Q. Differentiate between the image and shadow of an object.

Q. Which of the following statement(s) is/are true?

1. Shadows are created due to the absence of light.
2. Shadows have point to point relationship with the object.
3. Shadows don't have any colour.
4. Mirrors form a shadow when light is thrown on them.

Q. We define an image formed by a plane mirror to be a 'Virtual' image when

1. the reflected rays coming to our eyes from the mirror actually meet at a certain point
2. the reflected rays coming to our eyes from the mirror don’t meet at the object
3. the reflected rays coming to our eyes from the mirror only appear to be meeting at a certain point
4. the reflected rays coming to our eyes from the mirror don't appear to be meeting at any point.

Q. People with myopia cannot see distant objects clearly.

1. True
2. False

Q. An image A is formed on a screen. A plane mirror is placed in front of the screen, to capture the image of A. Let's call it B. Which of the following is true?

1. Both the images (A and B) are virtual
2. Image A is real, whereas image B is virtual.
3. Both the images (A and B) are real
4. Image A is virtual, whereas image B is real

Q. 44. Why shadow is always black in colour?

Q. An image A is formed on a screen. A plane mirror is placed in front of the screen, to capture the image of A. Let's call it B. Which of the following is true?

1. Both the images (A and B) are real
2. Image A is real, whereas image B is virtual.
3. Image A is virtual, whereas image B is real
4. Both the images (A and B) are virtual

Q. Human eye forms the image of an object on the _______.

1. cornea
2. iris
3. pupil
4. retina

Q. To obtain multiple images, two or more mirrors are required.

1. True
2. False

Q. A shadow is
(a) black in colour
(b) red in colour
(c) colour of the object
(d) none of these

Q.

why our shadow looks always in black colour?what is the reason behind it?why is it not look in different colours?

Q. Which part of human eye transmits electric signals to the brain?

1. Retina
2. Optic nerve
3. Auditory nerve
4. Cornea

Q. We all have observed that some people have black eyes, some brown and some light blue. Which part of the eye gives the colour?

1. Crystalline lens
2. Cones
3. Cornea
4. Iris

Q. Shadows are formed due to ____ propagation of light.

1. elliptical
2. curvilinear
3. circular
4. rectilinear

Q.

Red colour scatters the most since it has the smallest wavelength.

1. False

2. True

Q. Shadow of an object is formed when the object:

1. Allows the light to pass through it
2. Bounces back light
3. Absorbs light
4. Bends light