Question : A concave lens forms an image which is:

Option 1: real and erect

Option 2: virtual and erect

Option 3: real and inverted

Option 4: virtual and inverted

Question : One can distinguish a telescope from a microscope by observing.

Option 1: length

Option 2: colour

Option 3: size of the glass

Option 4: length and size of the lens

Question : In which of the following silicon is not used?

Option 1: Solar panels

Option 2: IC manufacturing

Option 3: Optical glass

Option 4: Ink pen

Question : Two equal glasses filled with alcohol and water in the proportions 2 : 1 and 3 : 2 are emptied into a third glass. The proportion of alcohol and water in the third glass will be:

Option 1: 13 : 17

Option 2: 19 : 17

Option 3: 13 : 11

Option 4: 19 : 11

Question : The ability to distinguish two closely placed objects is:

Option 1: Resolving power

Option 2: Video power

Option 3: Distinguish power

Option 4: Magnifying power