Question

True or False questions

9. An object 2 cm high is 30 cm in front of a concave mirror. The radius of curvature of the mirror is 20 cm. Student A determined that the image distance is 15 cm. Student A’s assessment is:

11. Students performed the Young’s double slit experiment to prove the evidence of the wave nature of light. During the experiment it was observed that light on a screen had a pattern of bright and dark fringes. The students concluded that this was the result of constructive and destructive interference of the light from the two slits. The conclusion drawn by the students is correct.

13. Student X stated that “an image formed by a lens is real if the rays appear to originate from a point and a real image cannot be seen on a screen”. Student X’s statement is incorrect.

15. Color can be said to be a property of light that reaches our eyes and is determined by its wavelength or its frequency

Answer 1

9.

True

By using mirror formula

Put and

We will obtain i.e. image is 15 cm in front of the mirror

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11.

Conclusion of student is True

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13.

True

Because real image can be obtained on screen.

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15.

True

Color depends on the frequency or wavelength of the photons reaching our eyes.