Why is focal length important?
What is the importance of focal length?
Why is the focal length of a concave lens negative? If the focal length of a double convex lens is 20cm, then what is its focal length in water? How can you measure the negative focal length of a simple lens? Why is the focal length of a convex lens always positive? How does the focal length of a lens change according to the colour of light? For what reason does Aperture affect the depth of field? What factors determine penis size? I have a convex lens of focal length 20cm,size 50mm. What should be the focal length and size of the other convex lens to make a powerful telescope? What is developing length? What is the width required for plinth beam? Is true length in graphics is the length of plan? An object of 2cm height is placed 10cm in front of a convex mirror forming an image of height 3cm. Find the focal length.? Does the size of a penis matter? In what way I should arrange two convex lenses to get highest magnification? Also tell,what should be their focal lengths? What is your preferred penis size? Length and girth? What is the definition of the slenderness ratio of a column? What is its importance? How important is the size of your penis to woman? What is pupillary distance? Why is it important? What are overlap lengths for columns, beam, slab etc? Is a small penis (13-14 cm) enough for a big girl? What is the averge penis size? When did size of the penis become important? Why doesn't the radius of curvature change when a lens is immersed in water, though focal length changes? How does the depth of field change with aperture? What should be the column size and beam depth for a span of 8 metres between two columns? What is the minimum length? Which is bigger: centimeters or millimeters? What is the size of the biggest dildo? Does penis size matter for girl or stamina? Is length a vector?