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Science · Physics

Por qué la teoría de la relatividad de Einstein fue tan revolucionaria

Why Einstein’s theory of relativity was so revolutionary

B210 minVideo reviewed

Original video date: May 24, 2019 · Guide updated: September 9, 2026 · Source: BBC News Mundo

Before you watch

This preparation gives you the video context, essential vocabulary, useful expressions and listening questions. Study it first, then watch the original Spanish-language video.

Start preparing with vocabulary ↓

What this video is about

This BBC News Mundo explainer introduces Einstein’s theory of relativity and explains why it changed the way scientists understand space, time and gravity. The video is short enough for focused listening while still presenting several connected scientific ideas.

Background you need

Einstein developed special and general relativity in the early twentieth century. These theories replaced the idea that space and time are completely fixed and offered a new explanation of gravity, with consequences for astronomy and modern technology.

Spanish video · 4:21

Qué es la teoría de la relatividad de Einstein y por qué fue tan revolucionaria

Spanish captions checked
Listening speed

Video by BBC News Mundo. Spanish captions were available and checked when this guide was prepared. The transcript is not republished here.

Key vocabulary

Essential vocabulary

The example sentences below were written for language practice; they are not quotations from the source.

Open the Spanish video on YouTube ↗
la teoría de la relatividadthe theory of relativity

Einstein’s framework for understanding space, time, motion and gravity.

La teoría de la relatividad transformó la física moderna.

The theory of relativity transformed modern physics.

el espacio-tiempospacetime

The combined physical model of space and time.

La masa puede curvar el espacio-tiempo.

Mass can curve spacetime.

la gravedadgravity

The physical interaction associated with mass and attraction.

La teoría ofrece una nueva explicación de la gravedad.

The theory offers a new explanation of gravity.

la velocidad de la luzthe speed of light

A fundamental constant in relativity.

La velocidad de la luz desempeña un papel central.

The speed of light plays a central role.

un observadoran observer

A person or reference frame from which an event is measured.

Dos observadores pueden medir el tiempo de manera distinta.

Two observers can measure time differently.

la masamass

A physical property related to the amount of matter and inertia.

Un objeto con masa afecta el espacio que lo rodea.

An object with mass affects the space around it.

Useful expressions

Expressions

marcar un antes y un después— to mark a turning point

La propuesta de Einstein marcó un antes y un después en la ciencia.

depender de— to depend on

La medición puede depender del movimiento del observador.

Language focus

Language focus

Explaining impact with marcar un antes y un después

This idiom is common when describing an idea that fundamentally changed a field.

El descubrimiento marcó un antes y un después.

Cause questions with por qué

“Por qué” introduces a direct or indirect question about the reason for a scientific change.

El video explica por qué la teoría fue revolucionaria.

Before you watch

Questions to keep in mind

  1. Which familiar ideas about space or time does the video challenge?
  2. How does the presenter connect mass with gravity?
  3. Listen for language that signals a major historical change.

Continue with the original

Now watch in Spanish

You have prepared the main context and language. The button opens the publisher’s original Spanish-language video in a new tab.

Open the original video on YouTube →

After watching

Reflect on what you heard

  1. Why was relativity revolutionary according to the video?
  2. Which scientific term was easiest to understand from the visual explanation?
  3. Explain one contrast between older and newer ideas about gravity.

Related topics

Physics

More preparations

Física cuántica explicada en menos de 5 minutos: las ideas esenciales · B2

De qué está hecho el universo: el bosón de Higgs y la “partícula de Dios” · C1

Nueva investigación revela quiénes son más vulnerables a las desinformaciones sobre salud · B2

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