Optics Answers

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"?

Show that it is possible for stimulated emission to be predominant over spontaneous emission at microwave frequencies at room temperature 300 k

A magnifying glass is held 4.0 cm from a photograph resulting in a magnification of 3.0 times. Determine the distance of the image from the lens and the focal length of the lens

In an astronomical telescope in normal adjustment a straight black line of length L is drawn on inside part of objective lens. The eye-piece forms a real image of this line. The length of this image is I. The magnification of the telescope is ________
Andeer L/I

.A container made of glass refractiveindex=1.5 contains a liquid.
A ray of light passing through the liquid falls on the bottom of the container at an angle of incidence =tan^(-1)(0.9)" and completely polarized.The ray should strike the bottom of the container at an angle of incidences so that it undergoes total internal reflection