Which best describes what happens to sunlight after it passes through the keyhole?

Which best describes what happens to sunlight after it passes through the keyhole?

Which best describes what happens to sunlight after it passes through the keyhole of a door? It converges into one particular shadow region. It spreads out into multiple shadow regions.

What is the formula for magnification obtained with a mirror?

The level of magnification is proportional to the ratio of v and u. An image that appears to be double the size of the actual object would have magnification m=2. The radius of curvature of a mirror is twice its focal length.

How do you calculate magnification on a diagram?

1. a. The drawing is roughly 7 cm long. This equates to 70 mm or 70,000µm.
2. b. The actual size of the organism is about 500 µm.
3. c. Drawing magnification = drawing size / actual size.
4. 70,000 µm / 500 µm = 140 X.
5. Drawing Magnification = 140 X.

How do you find focal length from magnification?

Focal length = (Object distance / ((1 / Magnification) + 1)) * 1000 , where: Object distance is given in mm; and. Magnification does not have a unit.

How is focal length determined?

The principal focal length of a lens is determined by the index of refraction of the glass, the radii of curvature of the surfaces, and the medium in which the lens resides. It can be calculated from the lens-maker’s formula for thin lenses. The rays then enter a diverging lens of focal length -10cm on the right.

How do you find the focal length of a concave lens?

You can calculate the focal length of the concave lens using the formula f2 = (f1F/(f1-F).

What is the rough focal length of convex lens?

The rough focal length of a convex lens is obtained by forming sharp image of a very distant object on a screen. The distance of the screen from the lens gives us the rough focal length of the lens.

Which Lens has more power?

convex

Why is a thin lens preferred over a thick one?

Assuming lens are made of the same material, the thicker one will be able to bend the light more as the light travels through it for a longer period of time. As we know, greater the bending lesser the focal length, so thin one will have more focal length.

What is the difference between thin convex lens and thick convex lens?

A convex thin lens is a lens in which the width of the lens (distance between the two opposite sides) is very small. A thick lens is a normal lens whose width is given a significant value. Fir same radii and refractive index a thick convex lens will have more focal length means less power.

Which has more power thick convex lens?

Thick convex lens has more power because of its shorter focal length.

What kind of image does a concave lens always produce?

Convex (converging) lenses can form either real or virtual images (cases 1 and 2, respectively), whereas concave (diverging) lenses can form only virtual images (always case 3). Real images are always inverted, but they can be either larger or smaller than the object.