# PTE SST #17: Visualizing Black Hole...

Summarize Spoken Text #17 - Level 3 - Feeds Writing + Listening

> You will hear a short lecture. Write a summary on what you have just heard from the lecture in your own words.You have 10 minutes to finish this task. Your response will be judged on the Quality of Your writing and on how well your response presents the key points presented in the lecture.

## Answer

The speaker describes visual simulations of orbiting and falling into a black hole. These simulations show how gravity distorts light, bending the view of stars and concentrating the universe's light into a bright ring. They help visualize how black holes affect perception. Thus, such tools aid understanding of the extreme effects of gravitational forces.

## Explanation

The lecture explains how black holes exert gravitational pull, causing light from background stars to distort and appear to spin. It also describes the event horizon as a boundary from which nothing can escape, and mentions how simulations can model different scenarios, such as free-falling into a black hole.

## Hints

- Focus on the main topic: how black holes affect the appearance of surrounding light and stars.
- Note the specific terms mentioned, such as 'event horizon' and 'gravitational distortion,' to include in your summary.

## Transcript

This simulation shows what you might see. If you are orbiting a black hole. The light and position of background stars around the hole are distorted by its gravity and they seem to spin around. On the right the constellation Orion appears to approach the event horizon the boundary from which nothing can escape. Orion stars look like they become separated and get spun around. Once the hole has passed by Orion reappears on the left and looks normal again. Users can also experiment with different scenarios. This is what you might see if you were traveling towards a black hole with rocket engines slowing your descent. Another simulation mimics free fall into a hole. In the middle the light of the entire universe appears to be concentrated in a bright ring.

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