Optics Answers

When color A and color B are sent through a prism, color A is bent more than color B. which color travels more rapidly in the prism? Explain.

The receiver for a dish antenna is placed in front of the concave surface of the dish. If the radius of curvature of the dish is R, how far in front of the dish should the receiver be placed? Explain.

7. At night a watchman shines a torch at a pool of water and observes a reflected spot of light on the opposite wall. The angle of depression of the torch and ray is 30o, and P, the point of reflection from the water surface, is 6 m from the wall.Calculate the distance h of the spot of light above the water

8. You are flying in a light aircraft at a speed of 39 ms-1. An eagle, whose speed is 18 ms-1, is flying directly toward you. Each of the given speeds is relative to the ground. The eagle emits a shrill cry whose frequency is 3400 Hz. What frequency do you hear? (Assume Speed of sound is 345 ms-1)
9. A man enters a tall tower and notes that a long pendulum extends from the ceiling to half the height of the building. If the height of the building is 60 m determine the period of oscillation?

Explain why the image was either upright or inverted when you shine a flashlight through a pinhole on a screen.

When you poke a pinhole though a screen, and shine a flashlight through the hole, the light is not going through a lens. Why, then, is the image on the white surface larger than the size of the pinhole?

When shining a flashlight through a drinking glass, why does changing the distance of the
flashlight from the glass change the size of the image? Why does it change other details about the
image (such as the blurriness of it)?

When shining the light through the drinking glass, what kind of lens was the glass acting as?
How do you know?

Question:a Plano convex lens of radius 3 cm is placed on an optically flat glass plate an illuminated by monochromatic light the diameter of the 8 bright ring in the transmitted system is 0.72 to CM .calculate the wavelength of light used

Please answer this question
Thanks

If the refractive index of glass is 1.5, what is the critical angle at the air-glass
interface?

What is physical state of buoyancy force

A.solid
B.liquid
C.gas

"the diameter of after 8 th dark ring is reflected system 4×10^-3m. find radius of curvature of the plano-convex lens used, if the wavelength of light is 589×10^-9 m"?