A thin concave lens has the focal length f = -5cm. Draw the ray diagram and locate the image for an object placed 3cm from the lens.An object is 10 cm away from a lens with a -15 cm focal length (concave lens). ...
In the experiment of finding the focal length of a convex lens, we should use: A. A ruler and a white paper B. A protractor and a mirror C. A ruler and a concave lens D. A protractor and a white paper 相关知识点: 试题来源: ...
In an experiment to measure the focal length of a convex lens, the measured focal length is shorter than the actual value. What could be the cause? A. The object distance is measured inaccurately and is too large. B. The image distance is measured inaccurately and is too small. C. The...
An object is placed 3 cm to the left of a convex lens of focal length f-2 cm, as shown above. (a) Sketch a ray diagram on the figure above to construct the image. Use a ruler! (b) Use the lens equation to calculate the image distance. Fi...
from a convex lens of focal length 8 cm, find the position, nature and height of the image. Solution Step 1 - Given data The height of the object h=7 cm The distance of the object from the optical center of the lens u=-12 cm The focal length of the lens f=+8 cm (The foca...
An object is at a distance of 20 m from a convex lens of focal length 0.3 m. The lens forms an image of the object. If the object moves away from the lens at a speed of 5 m/s, the speed direction of the image will be:
In a convex lens, if the object is placed at twice the focal length, the image formed will be: A. Virtual and enlarged B. Real and enlarged C. Real and of the same size D. Real and inverted 相关知识点: 试题来源: 解析 D。在凸透镜中,当物体位于两倍焦距处时,成的像是实像且倒立。
Find the dispersive power of the material of the lens. Make appropriate assumptions. View Solution A thin convex lens has focal length f1 and a concave lens has focal length f2. They are kept in contact. Now, match the following two columns. View Solution How are power and focal length...
Convex Lens with a Diameter of 70mm and Focal Length of 100mm Was Used in The Spotlight Imaging Experiment US$5.00 10-99 Pieces US$3.00 100-999 Pieces US$1.00 1,000+ Pieces Product Details Customization: Available Warra...
Find the focal length of the lens shwon in figure (a) If the light is incident form left side. (b) If the light is incident form right side. View Solution If f(V) and fR are the focal lengths of a convex lens for violet and red light respectively and FVand FR are the foca...