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The property of light travelling in a straight line is called as the rectilinear propagation of light.
A light source can be seen only if there is a straight-line path between the source and our eyes.

Examples:

Sunrays entering a dark room through a small opening appear to travel in a straight line.
Light from torch, headlights of cars, etc. appears to travel in a straight line.
Light from a projector travels in a straight line in the form of light rays towards the screen.
Light emitted from a laser pointer appears to travel in a straight line.

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Ananya Kale 6 years, 3 months ago

It describes the tendency of electromagnetic waves to travel in straight line

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What is biofocal

Posted by Gautam Singh 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Gautam Singh 5 years, 8 months ago

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Payal.. ??Singh 6 years, 3 months ago

Biofocal.....?

1Thank You

ANSWER

प्लेसेंटा क्या है

Posted by Vikas Vikas 6 years, 3 months ago

CBSE > Class 10 > Science

0 answers

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What r hydrocarbons? Explain with examples.

Posted by Ananya Kale 6 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Ananya Kale 6 years, 3 months ago

Thank u

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Ruhi Rao 6 years, 3 months ago

Compounds made of only hydrogen and carbon

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Pragati Jain 6 years, 3 months ago

All the organic compounds containing carbon and hydrogen are called hydrocarbons e. g. CH4

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ANSWER

Anjali told her chemistry teachers that biofuels should be used instead of fossil fuels . She read in science magazine that (Reaserchers have found that one of the most common bacteria. E.coil can digest simple sugars from plant waste and turn it into biofuel. Biofuels made from plant and animal waste , are alternative to petroleum based fuels.) A)what is fossil fuels? B) what are advantage of biofuel? C)Is preparation of biofuel a physical or chemical process? D) Why is biofuel better than petroleum products ? E) What values are possessed by anjali who wants to use biofuel ?

Posted by Vivek Verma 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Meena Gangwar 1 year, 9 months ago

biofuel is a fuel obtained from plants and animals waste

3Thank You

ANSWER

Who introduced the law of octaves

Posted by Kajal Devrani 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Rani Mishra ??? 6 years, 3 months ago

Newlands

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ANSWER

What are groups and periods

Posted by Kajal Devrani 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Aadya Singh ? 6 years, 3 months ago

Periods are horizontal row in the periodic table while groups are vertical column in the periodic table.

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ANSWER

Tell me about charcol✍✍✍✍✍

Posted by Ankesh. ??...Fully Motivated 6 years, 3 months ago

CBSE > Class 10 > Science

13 answers

Ankesh. ??...Fully Motivated 6 years, 3 months ago

Hii..sis..kaisi ho aap

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❄️ Queen ❄️ 6 years, 3 months ago

Hiiii

1Thank You

Aditya Parihar 6 years, 3 months ago

Hii

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Aadya Singh ? 6 years, 3 months ago

Areh...please ab ji ni bole the to...mat boliye phir se...?

2Thank You

Sahil Singh 6 years, 3 months ago

Hey.....

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Ankesh. ??...Fully Motivated 6 years, 3 months ago

Kuch ni h ji

1Thank You

Aadya Singh ? 6 years, 3 months ago

Aaj...ji. Ni bole...kya baat h...?

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Aadya Singh ? 6 years, 3 months ago

My pleasure...

2Thank You

Ankesh. ??...Fully Motivated 6 years, 3 months ago

Thanks aadya

1Thank You

Aadya Singh ? 6 years, 3 months ago

Charcoal is prepared from wood. When wood is burnt in limited supply of air, then water and other volatile materials present in it get removed and a black substance 'Charcoal' is left behind it. Charcoal is mainly carbon. It is used as a fuel for domestic purpose due to its high calorific values and it doesn't produce smoke while burning. It is easy to handle and convenient to use.

2Thank You

Avika Goel 6 years, 3 months ago

Form of coal High calorific value Bur without flames

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Shivam Mishra 6 years, 3 months ago

hru

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Shivam Mishra 6 years, 3 months ago

hii ankesh ji

1Thank You

ANSWER

which is the most important geographical factor for speciation

Posted by Yasaswini Singh 6 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is menstruation cycle?

Posted by Kuldeep Yadav 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Gouri Patil 6 years, 3 months ago

Menstruation cycle means every month female ovary releases a egg and when it does not get fertiliized with a sperm or male gamate then from the ****** the outer lining of uterus falls down with mucous in formmof blood . The duration is 8 to 9 days

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Assumption and reason

Posted by Pavan Sai 6 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Name the various tools of tracing evolutionary relationships which have been used for studying human variation .

Posted by ❄️ Queen ❄️ 6 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

How a new baby come into maternal belly

Posted by Lovish Yadav 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Shubham Kumar 6 years, 3 months ago

When sperm enter through ****** into a female body it will fertilise with ova and a new baby starts growing inside the female's body.

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ANSWER

How to draw f1and f2 generation

Posted by Kalyani Thamke 6 years, 3 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is light of reflection

Posted by Sameer Gour 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

The bouncing back of rays of light from a polished and shiny surface is called reflection or reflection of light. It is similar to bouncing back of a football after colliding with a wall or any hard surface.

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ANSWER

Explain how , characteristics are inherited through genes.

Posted by ❄️ Queen ❄️ 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

⛩Singh Empire ???? 6 years, 3 months ago

Through genes coping.....

2Thank You

ANSWER

What is light of refraction

Posted by Ashvjeet Awsaramal 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

⛩Singh Empire ???? 6 years, 3 months ago

The deviation in the path of light when light travel from one medium to another medium is known as refraction of light.

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ANSWER

What is meant by dominant genes and recessive genes ??? Give one example of each.

Posted by ❄️ Queen ❄️ 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Aryan Gangwar 6 years, 3 months ago

In f1 generation the gene which is visible is dominant and the other which is hidden is called recessive genes. For example: one tall(T) And one dearf(t) interbreed.then in F1 generation the genes of plany will be Tt and the plant is tall.It menas tallness T Is dominatnt while dwarfness t is recessive

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⛩Singh Empire ???? 6 years, 3 months ago

The genes which influence its characteristics in the persence of other genes are known as dominant genes........... While those which influence its characteristics in the persence of same type of genes are known as recessive genes....????

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ANSWER

How does the creation of variation in a species ensure its survival ??

Posted by ❄️ Queen ❄️ 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

Variation is useful for the survival of species over time. If a population of reproducing organisms were suited to a particular niche and if the niche were drastically altered, the population could be wiped out. However, if some variations were to be present in a few individuals in these populations, there may be some chance of their survival.
E.g.: If the temperature of water increases by global warming, most bacteria would die. But a population of heat resistant bacteria could survive here. These few variants would be resistant to the heat andwould survive and grow further.

1Thank You

ANSWER

Describe how solar cell is fabricated name two elements used for fabricating it what is solar cell panel

Posted by Naman Sharma 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 3 months ago

Solar Cells Fabrication Technologies :
•Crystalline Si Cell Technologies •Amorphous Si Cell Technologies •Thin Film Cell Technologies
Solar panels are devices that convert light into electricity. They are called "solar" panels because most of the time, the most powerful source of light available is the Sun, called Sol by astronomers. Some scientists call them photo voltaics which means, basically, "light-electricity."

1Thank You

ANSWER

Describe how solar cell is fabricated.Name two elements used for febricating it . What is solar cell panel

Posted by Naman Sharma 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Avika Goel 6 years, 3 months ago

Silicon and silver used for the fabrication solar cell

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ANSWER

What would you observe if b is added to a solution of copper sulphate

Posted by Narender Jain 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Mobarak Ahmed 6 years, 3 months ago

If b is added to a solution of CuSO4 then it will displace Cu from CuSO4 solution and brown coloured coating of Cu will be seen on the surface of metal b and also the blue colour of CuSO4 will fade

2Thank You

ANSWER

Mitochondria mening

Posted by Sumit Rarh 6 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 6 years, 3 months ago

Mitochondria are membrane-bound organelles present in the cytoplasm of all eukaryotic cells, that produces adinosine triphosphate (ATP), the main energy molecule used by the cell.

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Mobarak Ahmed 6 years, 3 months ago

Power house of the cell

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ANSWER

Mitochondria

Posted by Sumit Rarh 6 years, 3 months ago

CBSE > Class 10 > Science