Will a star Twinkle if seen from space (say moon or a spacecraft)?

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Asked Apr 25, 2024 256 Views

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Which is more readily seen at a distance, a white blotting paper or a polished mirror? Why?

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If a ray of light goes from a denser medium to rare medium, will it bend towards the normal or away from the normal?

Aman kumar Asked Apr 21, 2023

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Asked Apr 21, 2023 44 Views

If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?

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Asked Apr 25, 2024 334 Views

If the eye is kept very close to a converging lens (focal length = 10 cm) and at the optical centre of the lens and an object is kept at distance 'd' then the minimum distance 'd' of the object from the lens so that its image can be seen clearly by the defect free eye is :

ALOK_RAJ Asked Apr 25, 2024

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Asked Apr 21, 2023 52 Views

A ray of light travelling in glass emerges into air. State whether it will bend towards the normal or away from the normal?

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Asked May 8, 2024 111 Views

What is Light? Mention its two important uses.

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Asked Apr 25, 2024 206 Views

When a unpolarised light is incident on a plane glass surface, what should be the angle of incidence, so that the reflected and refracted waves are perpendicular to each other?

ALOK_RAJ Asked Apr 25, 2024

by ALOK_RAJ

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206 Views

Asked Jun 4, 2022 115 Views

तरंग प्रकाशिका क्या है? Tarang Parkashika Kya Hai?

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by Rupesh Kushwaha

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तन्तु प्रकाशिकी संचार में संकेत किस रूप में प्रवाहित होता है? Tantu Prakashki Sanchar Mein Sanket Kis Roop Mein Prabhavit Hota Hai?

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Asked May 30, 2023 45 Views

A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is (a) pushed into the coil, (b) withdrawn from inside the coil, (c) held stationary inside the coil?

KrAnkitYdv Asked May 30, 2023

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Asked Apr 21, 2023 46 Views

A ray of light travelling in air enters obliquely into water. Does the ray of light bend towards the normal or away from the normal? Why?

Aman kumar Asked Apr 21, 2023

by Aman kumar

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Asked Dec 11, 2022 57 Views

A light wave enters from air to glass. How will the following be affected?

Puja Kumari Asked Dec 11, 2022

by Puja Kumari

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Asked Aug 3, 2023 163 Views

Thomas throws a silver coin in the sea. The density of the coin is 0.985 gm/m3. Will the coin float on the surface of water or it will sink?

ALOK_RAJ Asked Aug 3, 2023

by ALOK_RAJ

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163 Views

Asked Jun 9, 2022 424 Views

We can hear music or some one speaking to us, because of the sound produced in the medium. If we go to the space, we will not be able to hear anything. How is sound produced in the medium?

Rupesh Kushwaha Asked Jun 9, 2022

by Rupesh Kushwaha

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2 Votes

424 Views

Asked Sep 12, 2023 226 Views

If x= (a-b), the maximum percentage error in the measurement of x will be —

Chandan Asked Sep 12, 2023

by Chandan

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Asked Sep 11, 2023 105 Views

A long spring is stretched by 2 cm, it potential energy is U. If the spring is stretched by 10 cm, the potential energy stored in it will be —

Chandan Asked Sep 11, 2023

by Chandan

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105 Views

Asked May 1, 2022 366 Views

The pressure of the liquid is not same at each point in the sea. If a diver dives into the sea, at which point the the diver will feel the maximum pressure?

Shiv roshan kushwaha Asked May 1, 2022

by Shiv roshan kushwaha

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366 Views

Asked Dec 4, 2023 466 Views

Two cars moving in opposite directions cover same distance d in one hour. If the cars were moving in north-south direction, what will be their displacement in one hour?

Sanjeev Yadav ji Asked Dec 4, 2023

by Sanjeev Yadav ji

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466 Views

Asked Jul 29, 2023 167 Views

If unit of length and time is doubled, the numerical value of ' $g$ ' (acceleration due to gravity) will become?

ANAND_YADAV Asked Jul 29, 2023

by ANAND_YADAV

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167 Views

Asked Feb 7, 2022 59 Views

Why can dust be removed from a carpet by shaking it, or by beating it with a stick?

AbhilashaRani Asked Feb 7, 2022

by AbhilashaRani

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Asked Jun 14, 2022 70 Views

A block B is pushed momentarily along a horizontal surface with an initial velocity $v$. If $\mu$ is the coefficient of sliding friction between $B$ and the surface, block B will come to rest after a time :

MrAgarwal Asked Jun 14, 2022

by MrAgarwal

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Asked May 6, 2023 56 Views

On which spacecraft did Rakesh Sharma make his historic trip to Space?

Shivam mathur Asked May 6, 2023

by Shivam mathur

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Asked Feb 23, 2023 45 Views

A star at which among the following locations would appear to twinkle more than others normally?

Inju2023 Asked Feb 23, 2023

by Inju2023

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Asked May 30, 2023 40 Views

Two circular coils $A$ and $B$ are placed closed to each other. If the current in the coil $A$ is changed, will some current be induced in the coil $\mathrm{B}$ ? Give reason.

KrAnkitYdv Asked May 30, 2023

by KrAnkitYdv

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Asked Apr 21, 2023 71 Views

Now, will you be able to explain why a frog was obtained through the arrow was aimed at the fish?

Aman kumar Asked Apr 21, 2023

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71 Views

Asked Feb 7, 2024 354 Views

Is it correct to say that two quantities which are to be added must have the same dimension.

Aayush Asked Feb 7, 2024

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Is it correct to say that two quantities which are to be multiplied must have the same dimension.

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Asked Feb 7, 2022 69 Views

In oil tankers some space is left at the top while filling them. Explain, why.

AbhilashaRani Asked Feb 7, 2022

by AbhilashaRani

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69 Views

Asked Apr 21, 2023 66 Views

As the optical density of a medium increases, the speed of light through it decreases. What if the optical density decreases?

Aman kumar Asked Apr 21, 2023

by Aman kumar

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66 Views

Asked Apr 21, 2023 55 Views

What is the speed of light in a medium of refractive index 6/5 if its speed in air is 3,00,000 km/s?

Aman kumar Asked Apr 21, 2023

by Aman kumar

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Asked Apr 21, 2023 64 Views

In which material do you think light rays travel faster: glass or air?

Aman kumar Asked Apr 21, 2023

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Asked Jul 4, 2023 49 Views

Suppose gravity of earth suddenly becomes zero, then in which direction will the moon begin to move if no other celestial body affects it?

Ankit kumar Asked Jul 4, 2023

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Asked Apr 21, 2023 41 Views

What will be the angle of refraction when the refracted ray passes along the surface of water?

Aman kumar Asked Apr 21, 2023

by Aman kumar

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41 Views

Asked Feb 7, 2022 71 Views

If the weight of a body is 6 N on the moon, it will be about ______ on the earth.

Gitesh Kr Garg Asked Feb 7, 2022

by Gitesh Kr Garg

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Asked Apr 21, 2023 78 Views

The angle between the incident ray and the normal is called the angle of incidence. If so, can you explain what is angle of refraction??

Aman kumar Asked Apr 21, 2023

by Aman kumar

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