A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its:

Monjur Alahi

A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its: 

(a) very small size (b) very large size (c) very high density (d) very low size


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

(c) A black hole is a region of space from which nothing, not even light, can escape. It is the result of the deformation of spacetime caused by a very compact mass. The simplest black hole has mass but neither electric charge nor angular momentum. The mass of a black hole is finite, the reason why a black hole has infinite density is that it's mass is concentrated into a space of zero-volume. Thus, it has a very high density.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
What is the special feature present in a human heart which does not allow mixing of blood

Heart is partitioned into four chambers

1 Answers 1 views
Ravi, the Marketing Manager of Weaver Garments Ltd. does not allow the salesmen working under

Status, Answer is correct

1 Answers 1 views
Ravi, the Marketing Manager of Weaver Garments Ltd. does not allow the salesmen working under ,

Status. Answer is correct

1 Answers 1 views
A closed vessel is half filled with water. There is a hole near the top of the vessel and air is pumped out from this hole.

(b) The pressure at the surface of the water will decrease. (c) The force by the water on the bottom of the vessel will decrease. EXPLANATION:   The option (a) is not true because...

1 Answers 1 views
When a resistor connected to a battery is heated due to the current which of the property does not change

When a resistor connected to a battery is heated due to the current, number of free electrons remains the same.

1 Answers 1 views
Some species of plants are insectivorous. Why ? (a) Their growth in shady and dark places does not allow them to undertake sufficient photosynthesis

(b) Insectivorous plants prey insects because most of the insectivorous plants grow in those area where there is deficiet of nitrogen in nutrients so they catch insect to fulfil its...

1 Answers 1 views
The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole ?

(b) The nitric acid in polar stratospheric clouds reacts with CFCs to form chlorine, which catalyzes the photochemical destruction of ozone.

1 Answers 1 views
Find the maximum wavelength of electromagnetic radiation which can create a hole—electron pair in germanium.

Band Gap = 0.65 eV, λ =? E = hc /λ = 1242 / 0.65 = 1910.7 x 10–9 m = 1.9 x10–5 m.

1 Answers 1 views
Which one among the following is correct about the Doctrine of Lapse? (a) It did not allow the Indian rulers to adopt any heir

(d) Doctrine of lapse, in Indian history, formula devised by Lord Dalhousie, governor-general of India (1848-56), to deal with questions of succession to Hindu Indian states.  According to ‘Doctrine of Lapse’,...

1 Answers 1 views
State the type of plan that does not allow any flexibility.

Rule does not allow any flexibility.

1 Answers 1 views
X