(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

When does a ray of light falling on a lens pass through it undeviated?

The diagram showed a lens as a combination of one glass block and two prisms. Complete the ray diagram and show the part of the incident ray AB after passing through the lens.
(i) Name of the lens formed by the combination.
(ii) What is the line XX’ called?
(iii) Mark the focus F.

Complete the following diagram and state what happens to the ray of light after refraction through the lens.

Complete the following diagram and state what happens to the ray of light after refraction through the lens.

Complete the following diagram and state what happens to the ray of light after refraction through the lens.

In the following diagram, L₁ and L₂ are the two convex lense placed at separation equal to the sum of focal lengths of the two lenses. A and B are the two rays of light incident on the lens L₁. Complete the path of rays till they emerge out of the lens L₂.

What principles have you used in completing the diagram?

Which characteristic property of light is responsible for the blue colour of the sky?

Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.

How can the presence of ultraviolet radiation be detected?

State two properties of ultraviolet radiation which differ from visible light.

State two uses of ultraviolet radiation.

What do you understand by spectrum? Name the seven prominent colours in order, as obtained in the spectrum of white light.

Distinguish between an impure spectrum and a pure spectrum.

Write the range of wavelength of the visible spectrum.

Write the range of wavelength of the ultraviolet spectrum.

Write the range of wavelength of the infrared spectrum.

Suggest one way, in each case, by which we can detect the presence of Infrared radiations.

Sunlight entering through a narrow aperture falls on a prism. Draw a neat labelled ray diagram to show the formation of the spectrum on a screen. Name the colour obtained nearer the base of the prism.

In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.

In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.