Question

Link Is e d. None of the above. QUESTION 2 The distance from the Earth to the sun is 1.496x1011 m.Suppose a solar flare occurs on the sun's surface. How long will l take the electromagnotic radation from O a. 8.3 minutes O b. 4.2 minutes the flare reach the Earth? c. 166 minutes O d 4.98 minutes e, 123 minutes QUESTION 3 A virtual image is formed 26.9 cm from a concave mirror having a radius of curvature of 48. 1 cm. Determine the object distance o b. 24 cnm a 12.7 cm ??. 48.1 cm d 13.4 cm e 19.3 cm f 26 9 cm QUESTION 4 In order to read very small writing a man pulls a magnilying glass from his draver He places the magnifying glass a Saue and Submit to save and

Answer 1

2.

We know that speed of electromagnetic radiation = c = 300000000 m/s (approx.)

hence time = distance / speed = 8.3 minutes

We know that speed of electromagnetic radiation = c = 300000000 m/s (approx.) hence time = distance/speed = 1.496 * 10^11/3 * 10^8 = 498.667 sec = 8.3 minutes hence option a. is correct. we know that curved mirror formulae 1/v + 1/u = 1/f for concave mirror focal length f = -radius of curvature/2 = -24.05 cm image distance v = + 26.9 cm hence from mirror formula we have = object distance u = -12.9676 cm hence option a. is correct

hence option a. is correct.

3.

we know that curved mirror formulae

for concave mirror focal length f = - radius of curvature / 2 = -24.05 cm

image distance v = +26.9 cm

hence from mirror formula we have = object distance u = -12.9676 cm

hence option a. is correct