light quiz

what is light?

photoresistor is also called as

• light sensor

• Light Resistor

• Light Dependent Resistor

• All of these

draw a simple circuit with bulb,wire,switch and close circuit

We can see most objects because

• they emit light

• they reflect light

• they produce light

• None of these

We are able to see an object due to the presence of

• (a) light

• (b) dark

• (c) refraction

• (d) object

An image formed by a concave ___________ cannot be obtained on a screen.

We can obtain a real, enlarged and inverted image by a concave mirror.

• True

• False

A convex lens is

• thick at centre

• thin at the centre

• thick at edges

• hollow at the centre

The coloured band of light obtained by dispersion of light is called

• image

• spectrum

• scattering

• none of these

(a) An image that cannot be obtained on a screen is called a ____________.