8. (2 (n) True (b) Palse. A virtuai 0. (2 pointa) The focal lengsh of pre (a) 5

Question

8. (2 (n) True (b) Palse. A virtuai 0. (2 pointa) The focal lengsh of pre (a) 5 em (b) 10 em (e) 20 cm (d) 40 can (e) 50 em 10. (2 pointa) A convex (a) True. (b) Pase 11. (2 pointa) Light (b) time. (e) effort will alwae travel from one place to another slong a path of teast (a) distance 12. (2 pointa) Object and image for a plane mirror lie (a) along the same plane. (b) equal distances from the mirror. (c) at right angles to each other. (d) all of these 13. (2 points) Refraction results from differences in light's (a) frequency (b) incident angles (c) speed (d) all of these 14. (2 points) When a beam of light emerges from water into air, the average light speed (a) increases (e) none of these (b) decreases (c) remains the same 15, (2 points) The critical angle for a transparent material is the angle at and beyond which all the light within the material is (a) refracted (b) reflected (c) absorbed (d) dispersed (e) diffused

Explanation / Answer

8. Question is not visible, answer is true.

9. for spherial mirror relation is Focal Length = Radius of Curveture / 2

Radius of Curveture = 2*Focal Length

Radius of Curveture = 2*20 = 40 cm.

10. False, for convex mirror image will be virtal always.

11. image and obect at same distance from mirror.

right answer is A) and B)

13) c) speed

14) a) increase.

15 ) b) reflected.

Related Questions

Navigate

• Browse (All)
• Browse 8
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.