under what circumstances red shadow can be formed

if you are standing in an open field at 12 noon,what kind of shadow would you see of yourself?

We see the sun rising 8 1/4 minutes after it has actually risen .Why ?

what is a periscope?

A solid, transparent sphere has a small, opaque dot at its centre. When observed from outside, the apparent position of the dot will be ?

Pls give ans with explanation

 why are we not able to see the shadow of bird when it flying uu in the sky ? why are able 

to see it when it is near to the ground?

how does sun get light?

skin is translucent transparent or opaque

and hand is translucent transparent or opaque

 why is shadow of an object formed in the direction opposite to the sideof light source?why should  we not look directly at the sun through pinhole camera?

what  is the difference between shadow and image

1). A transparent object does not form a clear shadow. Write reason

In a completely dark room if you hold up a mirror in front of you will you see the reflection of yourself in the mirror?

 is our palm (or hand) a opaque or translucent organ?? because when we take it near a torch light can pass through it patially...

so how will it be classified?

Is a wire mesh a transparent, translucent or opaque object?