Which of the following is not a mechanical wave?
wave propagatd in stretched string
wave in closed pipe
radio waves
water waves
sound waves
Correct answer is C
No explanation has been provided for this answer.
what part of the camera corresponds to the iris of the eye?
shutter
film
lens
diaphram
focusing ring
Correct answer is D
No explanation has been provided for this answer.
less than f
greater than f but less than 3f
equal to f
equal to 2f
greater than 2f
Correct answer is C
No explanation has been provided for this answer.
i and ii only
i and iv only
ii and iii only
i and ii only
Correct answer is D
No explanation has been provided for this answer.
An image which can be formed on a screen is said to be
virtual
blurred
inverted
erect
real
Correct answer is E
No explanation has been provided for this answer.