ICSE ICSE Class 7 - CISCE Question Bank Solutions for Physics

The mass of a lead piece is 115 g. When it is immersed into a measuring cylinder, the water level rises from 20 ml mark to 30 ml mark. 
Find the volume of the lead piece.

The mass of a lead piece is 115 g. When it is immersed into a measuring cylinder, the water level rises from 20 ml mark to 30 ml mark ,
Find the density of the lead in kg m^-3.

Write true or false of the following statement.

The image formed by a plane mirror is upright.

Write true or false of the following statement.

The objects are seen around us due to irregular reflection of light.

Fill in the blank

Angle of incidence = ___________

Fill in the blank

The incident ray, the reflected ray and the normal lie in one _______

Select the correct alternative

The angle of incidence on a plane mirror is 30°.The angle of reflection will be:

Select the correct alternative

The angle of incidence on a plane mirror is 30°. The angle between the incident ray and the reflected ray is

Explain the following terms:

Incident ray, Reflected ray, Angle of incidence, Angle of reflection, Normal.

A ray of light falls normally on a plane mirror. What is the angle of incidence ?

In the following diagrams, measure and write the angle of incidence and draw the reflected ray in a given case.

In the following diagrams, measure and write the angle of incidence and draw the reflected ray in each case.

In the following diagram, measure and write the angle of incidence and draw the reflected ray.

The following diagram shows an incident ray AO and the normal ON on a plane mirror. Find the angle of incidence and angle of reflection.

State in words, how do you find the location of image of an object formed by a plane mirror.

Draw a ray diagram showing the formation of image of a point object by a plane mirror.

Draw a diagram showing the reflection of a light ray from a plane mirror. Label on it the incident ray, the reflected ray, the normal, the angle of incidence i and the angle of reflection r.

State the two laws of reflection of light.

Describe an experiment to verify the laws of reflection of light. Ans. Laws of reflection.

The area of an irregular lamina is measured by using a ______.