Fill in the blank: The outer surface of a flat steel plate acts as a ___________ mirror.
Answer
The outer surface of a flat steel plate acts as a Plane mirror. Explanation: It acts as a plane mirror because it forms virtual, erect and same sized image of object.
Allow the light coming out of the other face of the prism to fall on a white sheet of paper or a white wall. Explain your observation.
Answer
Different component colours of white light bend differently, and so the constituent colours can be seen separately. And the colours are said to have dispersed after passing through the prism.
Can you get a real image at any distance of the object from the convex mirror?
Answer
No, we cannot get a real image for any position of an object from the mirror because convex mirror always forms virtual, erect and diminished image in spite of the position of object.
Fill in the blank: The inner surface of a steel spoon acts as a ___________ mirror.
Answer
The inner surface of a steel spoon acts as a Concave mirror.
It acts as a concave mirror because it forms real and virtual inverted and erect, magnified and diminished images depending upon the position of an object.
Concave mirrors are used by dentists to obtain a magnified image of the teeth. They are also used in solar heaters or solar concentrators, and as reflectors in flashlights, and headlights of cars and scooters.
Fill in the blanks:
An image formed by a concave ___________ cannot be obtained on a screen.
Answer
An image formed by a concave lens cannot be obtained on a screen.
The image formed by concave lens is always virtual. A virtual image cannot be obtained on a screen.
A rotating disc has a pencil that serves as a rotator. The disc is covered with violet, indigo, blue, green, yellow, orange and red coloured papers. When the disc is rotated, it appears white instead of the individual colours. Why?
Answer
This is because a mixture of colours of the rainbow in proper proportions produces white colour.
What is the relation between reflection of light and the image of an object?
Answer
The bouncing of light by any smooth surface, like a mirror, is called reflection of light. Due to the reflection of light, the impression of an object formed in a mirror is called the image of the object.