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Assertion (A): Black hole is such a celestial existence which cannot be seen by telescope.
Reason (R): The gravitational field of black hole is much strong that even light does not escape from it.

Assertion (A): Black hole is such a celestial existence which cannot be seen by telescope.
Reason (R): The gravitational field of black hole is much strong that even light does not escape from it. Correct Answer Both (A) and (R) are true and (R) is the correct explanation of (A)

Related Questions

In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, it has no locally detectable features. B: A black hole is a region of spacetime where gravity is so strong that nothing, no particles or even electromagnetic radiation such as light, can escape from it. C: The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. D: The boundary defining the region of space around a black hole from which no escape is possible is called the event horizon.
Consider the following statements about Gravitational Waves: 1. Albert Einstein predicted the existence of gravitational waves in 1916 in his general theory of relativity. 2. The gravitational waves can work as sirens to measure the expansion rate of the universe and to understand the origin and the future of the universe. 3. In 2015, LIGO physically sensed the distortions in spacetime caused by passing gravitational waves generated by two colliding black holes nearly 1.3 billion light-years away Which of the statements given above is/are correct?
Consider the following statements regarding Gravitational lensing 1. Gravitational lensing describes the fact that light is deflected by large masses in the universe. 2. The more massive the object, the stronger its gravitational field and hence the greater the bending of light rays. 3. Lensing, however, cannot be used to verify the existence of Dark Matter. Which of the statements given above is/are correct?
An assertion and a reason are given below. Assertion: The phenomenon of nuclear fission generates great energy. Reason: The process in which a nucleus is broken into two parts is called nuclear fission. Choose the answer. A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C. Both Assertion and Reason are false. D. Assertion is true but Reason is false.
Which of the following statements is/are correct? 1. In June 2016, the LIGO group of scientists announced the detection of a second set of gravitational waves. 2. Gravitational waves were generated due to merger of two black holes at about 1.4 billion light-years distant. 3. Gravitational waves were inserted due to collision of two white dwarf stars at about 14 billion light-years distant. Select the correct answer using the code given below:
Which of the following statements is/are correct? 1.In June 2016, the LIGO group of scientists announced the detection of a second set of gravitational waves. 2.Gravitational waves were generated due to merger of two black holes at about 1.4 billion light-years distant. 3.Gravitational waves were inserted due to collision of two white dwarf stars at about 1.4 billion light-years distant. Select the correct answer using the code given below.
Consider the following statements : A = If n is even, then n2 is even. B = If n2 is not even, n is not even. C = If n2 is even, then n is even. D = If n is not even, then n2 is not even. Which of the following statements is true?
Read the following passage carefully and choose the most appropriate answer to the question out of the four alternatives.
The human eye is a complex part of the body that is used for seeing. Eyes enable people to perform daily tasks and to learn about the world that surrounds them. Sight, or vision, is a rapidly occurring process that involves continuous interaction between the eye, the nervous system, and the brain. When someone looks at an object, what he really sees is the light reflected from the object. This reflected light passes through the lens and falls on the retina of the eye. Here the light induces nerve impulses that travel through the optic nerve to the brain and then over other nerves to muscles and glands.
The eye is similar to a television camera. Both the eye and the television camera convert light energy to electrical energy. The eye converts light to nerve impulses that are interpreted by the brain as the sense perception called sight. A television camera converts light to electronic signals that are broadcast and transformed into light images in a television receiver. It is wonderful that human eyes blink an average of once every six seconds. This washes the eye with the salty secretion from the tear or lachrymal glands. Each tear gland is about the size and shape of an almond. These glands are situated behind the upper eyelid at the outer corner of the eye. After passing over the eye, the liquid from the gland is drained into the nose through the tear duct at the inner corner of the eye. The sense perception that the brain releases after the eye converts light to nerve impulses is known as
Given below are certain facts about the “gravitational force”. Identify the INCORRECT one. A. Gravitational force depends on the intervening medium between the objects. B. Gravitational force is a type of conservative force. C. The gravitational force between two particles acts perpendicular to the line joining the two particles.
The escape velocity at the event horizon of a black hole is 3×108 m/s, i.e., the velocity of light. What is the mass of the black hole if the distance from its centre to the event horizon is 18km?