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

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ALOK_RAJ Asked Apr 25

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ALOK_RAJ Asked Apr 25

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

ALOK_RAJ Asked Apr 25

by ALOK_RAJ

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30 Views

ALOK_RAJ Asked Apr 25

133 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

by ALOK_RAJ

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133 Views

ALOK_RAJ Asked Aug 3, 2023

91 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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91 Views

Rupesh Kushwaha Asked Jun 9, 2022

166 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

1 Answer

2 Votes

166 Views

Chandan Asked Sep 12, 2023

130 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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130 Views

Chandan Asked Sep 11, 2023

52 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

1 Answer

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52 Views

Shiv roshan kushwaha Asked May 1, 2022

201 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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0 Votes

201 Views

Aayush Asked 2 Days Ago

11 views

What is Light? Mention its two important uses.

Aayush Asked 2 Days Ago

by Aayush

1 Answer

0 Votes

11 Views

ALOK_RAJ Asked Apr 25

55 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

by ALOK_RAJ

1 Answer

0 Votes

55 Views

Sanjeev Yadav ji Asked Dec 4, 2023

85 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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85 Views

ANAND_YADAV Asked Jul 29, 2023

114 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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0 Votes

114 Views

Rupesh Kushwaha Asked Jun 4, 2022

64 views

तरंग प्रकाशिका क्या है? Tarang Parkashika Kya Hai?

Rupesh Kushwaha Asked Jun 4, 2022

by Rupesh Kushwaha

1 Answer

3 Votes

64 Views

Mohit Asked May 4, 2022

234 views

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

Mohit Asked May 4, 2022

by Mohit

1 Answer

3 Votes

234 Views

Aayush Asked Feb 7

74 views

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

Aayush Asked Feb 7

by Aayush

1 Answer

0 Votes

74 Views

Aayush Asked Feb 7

74 views

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

Aayush Asked Feb 7

by Aayush

1 Answer

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74 Views

Chandan Asked Oct 15, 2023

52 views

A gas bubble from an explosion under water oscillates with a time period T which is proportional to $P ^{a} \rho^{b} E ^{c}$ where $P$ is the pressure

Chandan Asked Oct 15, 2023

by Chandan

1 Answer

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Chandan Asked Sep 11, 2023

49 views

Two balls of different masses m_a and m_b are dropped from two different heights a and b.

Chandan Asked Sep 11, 2023

by Chandan

1 Answer

0 Votes

49 Views

Chandan Asked Aug 6, 2023

175 views

A driver decreases the speed of a car from 25 m/s to 10 m/s in 5 Find the acceleration of the car.

Chandan Asked Aug 6, 2023

by Chandan

1 Answer

0 Votes

175 Views

ANAND_YADAV Asked Aug 2, 2023

87 views

A Carnot refrigerator extracts heat from water at $0^{\circ}{C}$ and rejects it to room at $24.4^{\circ}{C}$. The work required by the refrigerator for every $1{kg}$ of water converted into ice is

ANAND_YADAV Asked Aug 2, 2023

by ANAND_YADAV

1 Answer

0 Votes

87 Views

Chandan Asked Aug 1, 2023

106 views

A coil in the shape of an equilateral triangle of side 0.02 m is suspended from its vertex such that

Chandan Asked Aug 1, 2023

by Chandan

1 Answer

1 Vote

106 Views

Chandan Asked Sep 11, 2023

66 views

A vessel of volume 2000 cm ^{3} contains 0.1 mol of oxygen and 0.2 mol of carbon dioxide. If the temperature of the mixture is 300 K, find its pressure.

Chandan Asked Sep 11, 2023

by Chandan

1 Answer

0 Votes

66 Views

Shiv roshan kushwaha Asked Apr 3, 2022

128 views

A heavy uniform chain lies on a horizontal table. If the coefficient of friction between the chain and the table is 0.25. then the maximum fraction of the length of the chain that can hang over one edge of the table is

Shiv roshan kushwaha Asked Apr 3, 2022

by Shiv roshan kushwaha

1 Answer

3 Votes

128 Views

ALOK_RAJ Asked Apr 25

41 views

A person looking at another person wearing a shirt with a pattern comprising vertical and horizontal lines is able to see the vertical lines more distinctly than the horizontal ones.

ALOK_RAJ Asked Apr 25

by ALOK_RAJ

1 Answer

0 Votes

41 Views

Sanjeev Yadav ji Asked Dec 4, 2023

71 views

Ravi told his friend that his house is 1 km toward south from the Main Post Office. Express displacement and the distance moved by the friend from the Post Office when he arrives at Ravi's house. Mention the reference point chosen by you.

Sanjeev Yadav ji Asked Dec 4, 2023

by Sanjeev Yadav ji

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0 Votes

71 Views

John Michael Asked Oct 3, 2023

155 views

What happens to the image distance in the eye when we increase the distance of an object from the eye?

John Michael Asked Oct 3, 2023

by John Michael

1 Answer

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155 Views

Chandan Asked Sep 12, 2023

180 views

The sound from the surrounding entering into our ear are collected by pinna. The sound which enters into our ear is not of high amplitude. They are amplified inside our ear.

Chandan Asked Sep 12, 2023

by Chandan

1 Answer

0 Votes

180 Views

Sanjeev Yadav ji Asked Dec 4, 2023

69 views

What is meant by positive, negative or zero displacement?

Sanjeev Yadav ji Asked Dec 4, 2023

by Sanjeev Yadav ji

1 Answer

0 Votes

69 Views

AnjaliYadav Asked Apr 8, 2022

316 views

OR तथा AND गेट की सत्यता सारणी तथा बुलियन व्यंजक लिखें। OR Tatha AND Gate Ki Satyata Sarni Tatha Bullion Vyanjak Likhen

AnjaliYadav Asked Apr 8, 2022

by AnjaliYadav

1 Answer

5 Votes

316 Views

AnjaliYadav Asked Mar 25, 2022

534 views

NOT तथा OR गेट की सत्यता सारणी तथा बूलियन व्यंजक लिखें।

AnjaliYadav Asked Mar 25, 2022

by AnjaliYadav

1 Answer

5 Votes

534 Views

Chandan Asked Sep 13, 2023

87 views

If System Contains n Charges q1, q2, q3, _ _ _ qn. Then The Total Charges Of System.

Chandan Asked Sep 13, 2023

by Chandan

1 Answer

0 Votes

87 Views

ANAND_YADAV Asked Jul 29, 2023

93 views

If we use permittivity $\varepsilon$, resistance $R$, gravitational constant $G$ and voltage $V$ as fundamental physical quantities, then :

ANAND_YADAV Asked Jul 29, 2023

by ANAND_YADAV

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0 Votes

93 Views

Chandan Asked Sep 18, 2023

98 views

What will happen if apical meristem is damaged or cut?

Chandan Asked Sep 18, 2023

by Chandan

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0 Votes

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Ankit Asked Aug 25, 2023

104 views

Throw light on the changes taking place as a result of industrialization in India.

Ankit Asked Aug 25, 2023

by Ankit

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104 Views

Sanjeev Yadav ji Asked Aug 9, 2023

78 views

Do you think Indian films have certain basic weaknesses? Illustrate your answer, citing examples from the films you have seen.

Sanjeev Yadav ji Asked Aug 9, 2023

by Sanjeev Yadav ji

1 Answer

0 Votes

78 Views

ALOK_RAJ Asked Jul 14, 2023

317 views

प्रकाश के विक्षेपण को परिभाषित करें। Prakash Ke Vikshepan Ko Paribhashit Karen

ALOK_RAJ Asked Jul 14, 2023

by ALOK_RAJ

1 Answer

0 Votes

317 Views

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

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