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Subject: Science, asked on 7/2/18

what is yellow spot?

Subject: Science, asked on 7/2/18

Derive the formula of deviation of a prism. Plzz fast . Its urgent.. dont provide any link plzzzzz

Subject: Science, asked on 7/2/18

Why does sun appear reddish early in the morning? Will this phenomenon be observed by an observer for the moon?
Justify the answer with reason.

Subject: Science, asked on 7/2/18

Q. 25 Draw the ray diagram for refraction thro' prism , incident at an angle 35° . The ray suffers a deviation of 37° Mark the angles i.e A and D in the diagram and find their values .

Subject: Science, asked on 6/2/18

Why do we have convex lens in our eye ?

Subject: Science, asked on 4/2/18

I read that if earth had no atmosphere, the sky would have looked black due to no scattering of light. But if there is no scattering then the light will contain all colors and would appear white. So the sky would appear white? I am not understanding pls help fast, meritnation pre board at door.

Subject: Science, asked on 3/2/18

A student finds the writing on the blackboard as blurred and unclear when sitting on the last desk in the classroom. He however, sees it clearly when sitting on the front desk at an approximate distance of 2m from the blackboard. Draw ray diagrams to illustrate the formation of image of the blackboard writing by his eye lens when he is seated at the i) last desk ii) front desk.
Name the kind of lens that would help him to see clearly even when he is seated at the last desk. Draw a ray diagram to illustrate how this lens helps him to see clearly.

Subject: Science, asked on 2/2/18

​ is it true to say that the hypermetropic eye is corrected by using convex lens, this convex lens *makes a virtual image at the position of near point* so that the person is able to see that image clearly ?  

Subject: Science, asked on 2/2/18

Why does the color of sun looks different at different times of the day ?

Subject: Science, asked on 31/1/18

Why the planents do not twinkle

Subject: Science, asked on 30/1/18

Question number 20
 

Subject: Science, asked on 30/1/18

Why are clouds white?( I suspect since they are water, they refract all light)
But why clouds become black when it is going to rain?

Subject: Science, asked on 28/1/18

(iii) Abeam of light consisting of red, blue and yellow is incident of the prisms as shown below. Complete the diagram to show refracted and emergent ray.

Subject: Science, asked on 25/1/18

Can u ans. 45 and 46. For 46 option d is none.of these

Subject: Science, asked on 25/1/18

The minimum power of the eye lens is 40D. If the far point of the normal eye is infinity , find the size of eye ball. (Is the size coming as 2.5cm?)

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