For plane mirror, the image is formed behind the mirror, it is virtual and inver
ID: 1558441 • Letter: F
Question
For plane mirror, the image is formed behind the mirror, it is virtual and inverted. a. True b. False For plane mirror, the focal length is positive. a. True b. False The radius of curvature of a convex mirror. a. True b False The Law of Reflection states that the angle of reflection is equal to the angle of refraction. a. True b. False The condition for interference: phase angle must be constant and the frequency must be equal. a. True b. False The condition for polarization by reflection is when reflected angle and the refracted angle add up to 90 degree. a. True b. False A white light is dispersed into rainbow colors because each of the colors have different frequencies. a. True b. False Wave Optics helps to explain the concepts of interference, diffraction and dispersion. a. True b. False Light ray incident on spherical concave mirror, when reflected will pass through the center of curvature. a. True b. False The index of refraction is inversely proportional to the speed of light in the medium which the travels. a. True b. FalseExplanation / Answer
1.) For a mirror, real image is formed if the reflected rays intersect. If the reflected rays diverge after reflection image formed is virtual.
In a plane mirror reflected rays never intersect, so the image formed is virtual. But the image is not inverted. It's erect.
So staement 1 is false.
2) A plane mirror is an extension of a convex or concave mirror with an infinite radius of curvature. So focal length is infinity for a plane mirror. So it can be either +ve or -ve.
So, statement 2 is false.
3) The radius of curvature of a convex mirror is on the opposite side of the incident light. So it is positive.
So statement 3 is true.
4) According to the law of reflection, angle of reflection is equal to angle of incidence and not angle of refraction.
So statement 4 is false.
This concludes the answers. Check the answer and let me know if it's correct. If you need anymore clarification I will be happy to oblige...
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