Assertion-(A): Black hole is an astronomical existence that cannot be seen with binoculars. Reason-(R): The gravitational field on Black hole is so strong that it does not allow even light to escape. Select the correct answer by using codes given below: Codes:

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A and R both are true and R is the correct explanation of A. A black hole is an astronomical object with a gravitational pull so strong that nothing, not even light, can escape from it. A black hole's “surface,” called its event horizon, defines the boundary where the velocity needed to escape exceeds the speed of light, which is the speed limit of the cosmos. As the light cannot escape from a black hole, it cannot be seen with binoculars.

Assertion-(A): Black hole is an astronomical existence that cannot be seen with binoculars. Reason-(R): The gravitational field on Black hole is so strong that it does not allow even light to escape. Select the correct answer by using codes given below: Codes:

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