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Mangaluru, Apr 23: An astronomical phenomenon, ‘Zero Shadow Day', will be observed in Mangaluru on April 24 and in Udupi on April 25. 

According to a press release from Poornaprajna Amateur Astronomers’ Club, the wonder will commence and people will see their shadows disappear for a few moments at 12:28 pm.

The phenomenon is called as Zero Shadow Day. If a person takes a candle in a dark room and use it to create a shadow of one’s palm on the wall, the hand will cast shadow on the wall as one moves the hand. But when one places the palm on the wall, there will be no shadow.

In the phenomenon, the sun at these times shines exactly above the heads on these days. In astronomy, this point is called as Zenith. The point in the sky directly above an observer at any given location. So it is quite clear now that on Zero Shadow Day, the sun passes through the Zenith as a result of which, all objects will have minimal or no shadow if they are on the ground.

The reason for this happens on some specific days is concerned with astronomy. The earth spins around on its own axis and causes days and nights. It also revolves around the sun causing a year. But the seasons are caused because the axis is tilted at an angle of 23.5 degrees. It is because of this tilt that the sun rises every day in the east gradually moving towards the north till June 21st and then slowly proceeding towards the south till December 21st every year. “We call these days solstice. This means the sun shines between the Tropic of Cancer and Tropic of Capricorn every day passing by the equator on the days we call equinox,” the release stated.

As the earth moves around the sun and revolves on its own axis, for all the people between Tropic of Cancer and Tropic of Capricorn, the Sun at noon moves father and closer to the zenith passing through zenith twice causing two Zero Shadow Days per year. People at Mangaluru will observe this on April 24 and August 18 every year and People in Udupi will observe this on April 25 and August 17 every year.

Places with same latitudes will observe the same days of Zero Shadow but the time would vary with longitude. For example, people of Bengaluru as they share the latitude with Mangaluru will also observe it on April 24. While the people of Mangaluru will observe their shadows disappear at 12.28pm, people of Bengaluru will observe this at 12:17pm. Places like Moodabidri, Bantwal, Sakleshpur and Hassan will also observe Zero Shadow on April 24.

Places like Brahmavar, Karkala, Sringeri, Kudremukha, Chikkamagaluru will observe the Zero Shadow Day on the same day as Udupi on April 25.

Bengaluru, Jun 29: Bengaluru continued to see a sharp spike in covid- 19 cases as 738 more people tested positive on Monday that took the city's tally to 4052 of which 3427 is active.

The surge in Bengaluru pushed up the number of positive cases to 1105 across Karnataka. The total number of cases in Karnataka now stands at 14,295 of which 6382 are active.

The death toll stood at 230 as 19 more people died in the 24 hours till 5 pm on Monday.

Karnataka, particularly Bengaluru, has seen a sharp rise in cases over the last two weeks indicating the possibility of community transmission and further rise in cases.

Estimates by government authorities project that Karnataka will have around 25,000 cases by mid-August.

R.Ashok, the revenue minister incharge of covid- 19 in Bengaluru on Monday told doctors that they would have to dedicate another six months to contain the virus indicating that authorities were expecting the case count to rise in subsequent days and months.

The city reported over 3,200 cases since 19 June as against 844 cases between 8 March and 18 June.

There are around 500 containment zones in Bengaluru that is likely to have an impact of business and activities in the state's growth capital and its efforts to revive the economy.

The state government on Monday held meetings with private hospitals to increase the number of beds available for treatment of covid- 19.

The number of people in intensive careunits (ICU) jumped to 268.