APD to monitor air quality in Mangaluru during Diwali

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, Mar 23: Karnataka government today decided to go for complete lockdown. This includes the closure of all non essential government offices, suspension of all public transport services and banning of mass prayers in places of worships across the state.

Chief Minister BS Yediyurappa had expressed the need for a complete lockdown like the Janta Curfew on Sunday. Going by this, there will be no government transport services at least till March 31 and as many as 19,000 government buses will be off the road.

The government also decided to cancel the famous Karaga festival. The CM said that all celebrations and functions will be called off along with mass prayers in mosques and churches.

The CM said that they have decided to procure 1,000 ventilators and 10 lakh face masks in addition to other health equipments.

Private hospitals have come forward to spare their doctors and nursing staff to attend to Covid-19 patients in government hospitals, the CM said.

Yediyurappa also said that he has directed the health department to paste notification on the houses of residents who are infected with coronavirus. This is being done after people with indelible seals and home quarantined are reported to be roaming freely. The notifications will help neighbours to keep an eye on them.

The CM said the government-run Indira Canteen will serve free food to the poor until the lockdown continues. He also said that action will be initiated against non essential shops that are open despite a directive to shut down.