A group of students on a trekking trip understands that they must continue travelling east to reach the destination. To understand the direction, they used a magnetic needle inserted in cork and placed in a bowl of water. After sometime, the needle settled in a certain direction as shown in the image. Which direction should the group of students travel to reach their destination?

What happens to the light rays when they hit the specimen?

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?