Leaves a Bad Taste: Large Vanilla McCafe Shake: 820 calories. A large (22 oz) vanilla milkshake from the McCafe will set you back 820 calories. That's about two-thirds of a whole day's calorie content of 1,500, recommend for weight loss. A medium (16 oz) shake has 670 calories, while the small (12 oz) vanilla milkshake has 530 calories.
Darkness doesnât involve waves because itâs a lack of electromagnetic waves. If you define the speed of dark to be the speed at which you could find out about someone turning out the lights, itâs exactly the same as the speed of light: 671 million mph, or 2.99 x 108 m/s, or about 1 foot per nanosecond.
Speed of light in a vacuum is thought to travel at 186,282 miles per second. But James Franson from Maryland University believes it is slower than this. In 1987, light particles of a supernova arrived 4.7 hours later than expected. Dr James Franson suggests this may be because of 'vacuum polarisation'.