Question 1

If the angle of incidence of light falling on a plane mirror is 30degree, what will be the angle of reflection?&#10;A)90 degree&#10;B)60 degree&#10;C)30 degree&#10;D)0 degree

Accepted Answer

According to the law of reflection, the angle of incidence is equal to the angle of reflection. Therefore, if the angle of incidence is 30 degrees, the angle of reflection will also be 30 degrees.

Question 2

Whe we stand in front of our dressing table, our left hand seems to be right and right seems to be left. This is called&#10;A)Left-right confusion&#10;B)Lateral inversion&#10;C)Up -side down phenomenon&#10;D)mirage

Accepted Answer

Lateral inversion is the phenomenon where the left and right sides of an image are reversed when reflected in a mirror, which explains why our left hand appears to be on the right and vice versa when we look in a mirror.

Question 3

Light passing through a prism splits into its colour. This is called&#10;A)Dispersion&#10;B)Dissolution&#10;C)Division&#10;D)None of the above

Accepted Answer

When light passes through a prism, it splits into its component colors due to dispersion. Dispersion occurs because different colors of light travel at different speeds in the prism material, causing them to bend at different angles.

Question 4

Rainbow is a natural phenomenon showing&#10;A)Reflection&#10;B)Refraction&#10;C)Dispersion&#10;D)Diversion

Accepted Answer

Rainbow is a natural phenomenon showing dispersion, which is the separation of light into its component colors.

Question 5

In the retina of the eye, the area having no sensory cells is called&#10;A)iris&#10;B)Blind spot&#10;C)cornea&#10;D)Dark spot

Accepted Answer

The blind spot, or optic disc, is the point in the retina where the optic nerve exits the eye. It lacks photoreceptor cells, making it insensitive to light and creating a spot in our visual field where we cannot see images.

Question 6

If light falls perpendicularly on a plane mirror, what will be the angle in which it will be reflected?&#10;A)45 degree&#10;B)90 degree&#10;C)180 degree&#10;D)360 degree

Accepted Answer

When light falls perpendicularly on a plane mirror, it is reflected back in the same direction. The angle of incidence is 0 degrees, and the angle of reflection is also 0 degrees.

Question 7

Which of the following is not luminous object?&#10;A)sun&#10;B)candle&#10;C)moon&#10;D)Tube light

Accepted Answer

The moon is not a luminous object because it does not produce its own light; instead, it reflects light from the sun.

Question 8

To make a kaleidoscope we require&#10;A)Three plane mirrors&#10;B)Four plane mirrors&#10;C)Three glass sheets&#10;D)Four glass sheets

Accepted Answer

A kaleidoscope typically requires three plane mirrors arranged in a triangular tube to create the reflective patterns.

Question 9

In our eye _______cells can sense colour&#10;A)Rod&#10;B)Cone&#10;C)Both rod and cone&#10;D)Neither rod nor cone

Accepted Answer

The answer of In our eye _______cells can sense colour&#10;A)Rod&#10;B)Cone&#10;C)Both...

Question 10

An owl can see clearly at night but not day time because it has&#10;A)More rods and few cones&#10;B)Less rod and more cones&#10;C)More rods and more cone&#10;D)Less rods and less cones

Accepted Answer

Owls have more rods and fewer cones in their retinas, which allows them to see better in low light conditions. Rods are responsible for vision in low light, while cones are responsible for color vision and function best in bright light.

Deck 1: Optics and Light: Exploring Reflection, Refraction, and Perception