“During the partial eclipse, the Sun is as bright as usual.”
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Clarification - the uneclipsed part of the sun is as bright as usual, no brighter, no darker.
Overall, the Sun output reaching us is obviously getting smaller, as the uneclipsed disk itself is getting smaller, so the earth is getting darker even during the partial eclipse.
However, the Sun disk is about million times brighter than the corona, so even just a little bit of disk will outshine the corona.
So only during totality, we can actually observe the solar CORONA, which is why the totality is soo special!!!
Please, do not settle for partiality, you must see the totality! It is unbelievable!
You will never forget it and ask for more.
That why there are those eclipse chasers, who do not spare any expense or safety, just to go to all kind of places for couple of minutes look at the corona.
https://apnews.com/article/total-solar-eclipse-april-2024-83164668ee08b0a0c92e1d2ac41e91aa
WHY IS TOTALITY LONGER?
By a cosmic stroke of luck, the moon will make the month’s closest approach to Earth the day before the total solar eclipse. That puts the moon just 223,000 miles (360,000 kilometers) away on eclipse day.
The moon will appear slightly bigger in the sky thanks to that proximity, resulting in an especially long period of sun-blocked darkness.
What’s more, the Earth and moon will be 93 million miles (150 million kilometers) from the sun that day, the average distance.
When a closer moon pairs up with a more distant sun, totality can last as long as an astounding 7 1/2 minutes. The last time the world saw more than seven minutes of totality was in 1973 over Africa. That won’t happen again until 2150 over the Pacific.
HOW DO I SAFELY WATCH THE ECLIPSE?
Sunglasses won’t cut it. Special eclipse glasses are crucial for safely observing the sun as the moon marches across the late morning and afternoon sky, covering more and more and then less and less of our star.
During totality when the sun is completely shrouded, it’s fine to remove your glasses and look with your naked eyes. But before and after, certified eclipse glasses are essential to avoid eye damage. Just make sure they’re not scratched or torn.
Cameras, binoculars and telescopes must be outfitted with special solar filters for safe viewing. Bottom line: Never look at an exposed sun without proper protection any day of the year.