Nature of concave mirror
A concave mirror can form a real and inverted image. When the object is placed very close to the mirror, the image formed is virtual, erect and magnified.
What is real image and virtual image ?
An image formed on a screen is called a real image. The image could not be obtained on a screen. Such an image is called a virtual image.
Why is AMBULANCE written laterally inverted on an Ambulance van?
The word ‘AMBULANCE’ is written as in laterally inverted. When the driver of a vehicle ahead of an ambulance looks in her/his rear view mirror, she/he can read ‘AMBULANCE’ written on it and give way to it. It is the duty of every one of us to allow an ambulance to pass without blocking its …
Why is AMBULANCE written laterally inverted on an Ambulance van? Read More »
What is Nature of plane mirror?
Nature of plane mirror :- 1) The image formed by the plane mirror is virtual and erect i.e. image cannot be projected or focused on a screen. 2) The distance of the image ‘behind’ the mirror is the same as the distance of the object in front of the mirror. The size of 3) the image formed …
What is plane mirror ? How it is formed ?
A plane mirror is a mirror with a flat (planar) reflective surface. A plane mirror is made using some highly reflecting and polished surface such as a silver or aluminium surface in a process called silvering. After silvering, a thin layer of red lead oxide is applied at the back of the mirror.
What is an image ?
Place a lighted candle in front of a plane mirror. Try to see the flame of the candle in the mirror. It appears as if a similarcandle is placed behind the mirror. The candle, which appears behind the mirror, is the image of the candle formedby the mirror
What is reflection of light ?
When a ray of light falls on any object (polished, smooth, shiny object), light from that object bounces back those rays of light to our eyes and this is known as “Reflection” or “Reflection of Light”.
What is light ?
1)Light is an electromagnetic wave . 2)Light travels in a vacuum as well as transparent medium. 3) It makes vision possible. 4)electromagnetic radiation of any wavelength that travels in a vacuum with a speed of 299,792,458 meters (about 186,000 miles) per second . 5) such radiation that is visible to the human eye.
What is nichrome and its uses.
Nichrome wire is an alloy, it is mixture of nickel, chromium etc. Its chemical composition gives high resistivity and good oxidation resistance. Nichrome 80/20 wire is used as heating element such as in heaters, furnaces , home appliances and various other heating applications.
What is filament of electric bulb?
Filament of bulb is made up of tungsten element. Due to high resistivity of tungsten it heats up faster glow up.