Light Quiz for Class 10

What is the speed of light in a vacuum?

• 300,000 km/s

• 150,000 km/s

• 500,000 km/s

• 750,000 km/s

Which of the following colors has the shortest wavelength?

• Red

• Green

• Blue

• Yellow

In the process of reflection, light:

• Bends

• Changes color

• Changes speed

• Bounces back

The angle of incidence is equal to the angle of:

• Refraction

• Diffraction

• Reflection

• Dispersion

Which type of mirror always forms a virtual and erect image?

• Convex

• Concave

• Plane

• Spherical

The phenomenon responsible for the formation of a rainbow is:

• Refraction

• Reflection

• Dispersion

• all

Answer explanation

The unit of measurement for the power of a lens is:

• Diopter

• Watt

• Newton

• Joule

When light passes from air to glass, it generally:

• Speeds up

• Slows down

• Remains constant

• Changes color

The bending of light waves around obstacles is known as:

• Reflection

• Refraction

• Diffraction

• Dispersion

The colors of an object are determined by its:

• Size

• Temperature

• Chemical composition

• Interaction with light