40ббприготовьтесь говорить о полезном изобретении. упомяните: • когда это было сделано и кем; • какое оно и с какой целью оно используется; • почему вы считаете, что оно полезно.

An incandescent light bulb is an electric light with a wire filament heated to such a high temperature that it glows with visible light (incandescence). The filament is protected from oxidation with a glass or fused quartz bulb that is filled with inert gas or a vacuum. It is used to illuminate the space.

Thomas Edison is widely considered to be the inventor of the incandescent bulb, but there are a number of people who invented components and prototypes of the light bulb well before Edison did.

One of those people was British physicist Joseph Wilson Swan, who actually received the first patent for a complete incandescent light bulb with a carbon filament in 1879. Swan’s house was the first in the world to be lit by a light bulb. Edison and Swan merged their companies and together they were the first to design a bulb that was commercially viable.

I think that an incandescent light bulb is useful because the sun is almost the only one natural illuminant. This invention allow people work

I have a big family. First of all let me introduce myself. My name is Regina. I'm twelve years old. I'm at 6-th grade. There are three kids in our family include me. My elder brother name is Ildar, my younger sister Svetlana. Ildar is twenty-five. He is an engineer in a plant. He graduate University in 21 years. Svetlana is 10 years. She is in 4-th grade. She want to become a doctor. Also we have a pet. It is cat. His name is Timon. It is my favourite cat. My parents are not so old. My father is fifty-one, he is a driver. My Mum is fifty, she works in a library. Also I have grandmother an grandfather. They are both teachers. My grandparents are already retired. They like gardening and spend all their time growing potatoes, tomatoes and so on. Every week we go to the swimming pool. I like to play with my cat. Sometimes I play in different games with my sister Svetlana. Ildar helps me to do home work. Every week we also go shopping and buy fruits, tasty food and, of course, а toy for me. I love my family!

I have a big family. First of all let me introduce myself. My name is Regina. I'm twelve years old. I'm at 6-th grade. There are three kids in our family include me. My elder brother name is Ildar, my younger sister Svetlana. Ildar is twenty-five. He is an engineer in a plant. He graduate University in 21 years. Svetlana is 10 years. She is in 4-th grade. She want to become a doctor. Also we have a pet. It is cat. His name is Timon. It is my favourite cat. My parents are not so old. My father is fifty-one, he is a driver. My Mum is fifty, she works in a library. Also I have grandmother an grandfather. They are both teachers. My grandparents are already retired. They like gardening and spend all their time growing potatoes, tomatoes and so on. Every week we go to the swimming pool. I like to play with my cat. Sometimes I play in different games with my sister Svetlana. Ildar helps me to do home work. Every week we also go shopping and buy fruits, tasty food and, of course, а toy for me. I love my family!