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Google Doodle marks determination of speed of light 340 years ago

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8 years ago

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Google Doodle, Google, New Delhi, determination of speed of light, Danish astronomer Ole Roemer, Danish astronomer Ole Roemer,New Delhi: Google Doodle has celebrated the occasion of determination of speed of light 340 years ago with a Doodle on Wednesday. Danish astronomer Ole Roemer determined the speed of light – 299,792,458 metres per second – in 1676.

For NASA Astronomy Cafe, part of the NASA Education and Public Outreach programme, Sten Odenwald explained that in 1676, Roemer was studying the eclipses of Jupiter’s moons by the disk of Jupiter, and he noticed that during the year his predictions ran behind the actual eclipses he would see at the telescope.

Since the satellites had well-determined orbits with fixed orbit times around Jupiter, he correctly deduced that the delay between his prediction and the actual eclipse had to do with the difference in time it took for light to get to earth as the distance of Jupiter from the earth changed during the year.  The amount of time was of the order of an hour or so throughout the year.

Knowing the distance to Jupiter from the astronomical ephimerides, and the time delay, he estimated the speed of light to be 299,792,458 metres per second. Albert Einstein’s theory of relativity is built on the premise that the speed of light in a vacuum is always the same.

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Apple is giving a huge discount on its gadgets: Details inside

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3 years ago

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May 5, 2022

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If you want to buy an iPhone and were waiting for a nice offer, then we have a piece of good news for you! Amazon Summer Sale May 2022 has begun and they are offering major discounts on various smartphones, laptops, and smart TVs, among others.

The sale is live now on the e-commerce platform with no-cost EMI options and exchange discounts on various products. In addition to this, Amazon has also partnered with several banks including ICICI, Kotak Bank, and RBL so that customers get instant discounts of up to 10% using their cards and EMI transactions.

Customers can easily enjoy this summer sale and get massive discounts on iPhones. They can also compare prices on Flipkart Big Saving Days Sale 2022 before making a purchase.

 

Amazon Summer Sale May 2022: Discount offer on iPhone 13 

Apple’s coveted phone model iPhone 13 in the 128 GB storage model will be available during the Amazon Summer Sale May 2022 for Rs 64,900. The MRP of the phone is Rs 79,900. This means that the customers will be able to enjoy a discount of up to Rs 15,000 on the purchase of the iPhone 13.

If you have an old iPhone in working condition then you will also be eligible to receive another additional discount worth up to Rs 17,000 on the iPhone 13.

Buy at Rs. 64,900 (MRP – Rs. 79,900)

Features of Apple iPhone 13 

The iPhone is powered by an A15 Bionic processor with 6 core CPU. Apart from this, it has 16 core neural engines. With the iPhone 13, up to 512 GB of storage will be available. The iPhone 13 has a 6.1-inch Retina XDR display with 1000 nits brightness.

The iPhone 13 has a 12-megapixel dual rear camera setup. This time a new wide-angle camera has been given, whose aperture is f/1.6. With this, there is support for sensor optical stabilisation. Night mode has been made better than before. The second lens is also 12 megapixels ultra-wide and has an aperture of f/2.4.

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