Ray Optics Test

Result

Ray Optics Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

A man in an empty swimming pool uses a magnifier (n = 1.25) to enlarge the print on a plastic instruction sheet. If the pool is filled with water with refractive index of 1.33, what happens to the magnification of the print?

A
It decreases and is less than one

B
It increases and is greater than one.

C
It stays the same.

D
It decreases, but is still greater than one.

Solution

Since the water has a greater index of refraction than the lens,

Therefore, the magnifier will now acts like a diverging lens.

The image will be smaller than the object.
Question 2
1 / -0

Statement-1: It is not possible to see a virtual image by eye.

Statement-2: The rays that seem to emanate from a virtual image do not in fact emanate from the image.

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanation of Statement-1.

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

C
Statement-1 is true but Statement-2 is false.

D
Statement-1 is false but Statement-2 is true.

Solution

Using a plane mirror we see our virtual image, hence statement-1 is false.
Question 3
1 / -0

Which of the following quantities for a lens depend on the color /wavelength of the incident light?

A
Focal length

B
Image distance

C
Power

D
Chromatic aberration

Solution

Since refractive index depends on wavelength, therefore focal length, power, image distance and chromatic aberration depends on the color/wavelength of the incident light.