Physics
What is focal plane
(a) First (b) Second (c) Third 0)+61.1 Q3: A plane mirror is placed vertically facing due north. An arrow pointin) this mirror. In which of these direction will the arrow point in this image (a) North-east (19..South-east (c) South-west (d) Nort Q4: The focal length eira convex mirror is 12 cm. The radius of curvature o (a) barn (b) 18cm (c) 12 cm 10) 24 c Q5: Scattering °flight is minimum for Red colour (b) Yellow colour (c) Green colour (d) Blue Q6: In the following questions, a statement of assertion followed by a statei the correct answer out of the following choices. (a) Both assertion and reason are correct but reason is the correct explat (b) Both assertion and reason are correct statements but reason is not co (c) Assertion is correct but reason is wrong statement (d) Assertion is wrong but reason is correct statements (e) Both assertion and reason are wmng statements I. Assertion: The stars twinkle while the planets do not. Reason: The stars are math bigger in size than the planets. 2. Assertion: Some animals like owl can see-ale-arty during night or dark Reason: They have large no of rods on their retina. ‘- Q7: Does light is visible itself? 9):,-Power of a lens is I D. What does it mean? ,Q(2),…How is the sense of vision carried from the eye to the brain? “10: What is focal plane? An object of height 4 cm is placed at a distance 30 cm fmm the opt focal length 20 cm. Draw a ray diagrarn to find the position and size of the i fall- Make two diagrams to explain refraction and dispersion? .) ,Q1-3: Show and explain the refraction through glass prism with clear parameter, caj$1,How could you find the focal length ola convex lens rapidly but apps A student focused the image of a candle flame on a white screen usii • the position of the candle screen and the lens as under: Position of candle 12.0 cm; Position of convex lens : 50.0cm:
