Questions

Yes

The size of the pupil of the automatically adjusts itself according to the intensity of light passing through it; if the intensity is more, the size is less, if less, it is more. So in our case the pupil should dilate i.e , increase in size to be able to see in the dark. This switchover takes some time. But here the entry into the dark room is immediate. So the eye has no time to adjust itself and hence is not able to see at all for a while. 

Ganesh Vasudev Mavalankar popularly known as Dadasaheb was an independence activist, the President of the Central Legislative Assembly, then Speaker of the Constituent Assembly of India, and later the first Speaker of the Lok Sabha, the lower house of the Parliament of India.

Honshu is the largest of the four main islands and is approximately equal in area to United Kingdom. Tokyo is one of the five largest cities of the world.

Without a word in it, it can't be called as song.